Imagined in the 1960s

A small prize. A bare capsule for a lone traveller is a cheap niche form of space transport.

Who is paid. Carriers or expedition firms would buy it, assumed here, and existing spacecraft builders could all make something so simple.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A working vessel for travel between worlds would found a transport industry of its own.

Who is paid. Carriers and expedition firms buy ships, and many yards could build them once shown how, so established vehicle builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A sail pushed by light that carries a ship to another star would open other stars to those who go, a transport industry of its own.

Who is paid. Ship operators buy the sail as their engine, and a thin reflecting sheet is something other makers could copy, so established ship builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Breathable air is essential aboard, but this is a fitting inside a craft or suit, not an industry of its own.

Who is paid. Ship operators pay for it within the craft, and the established builders of ships and suits supply it because the method is easy to copy.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Knowing where a ship is and keeping it on course is essential but is an instrument within the ship.

Who is paid. Ship operators buy it as part of the craft, and the established makers of flight instruments supply it since it can be copied.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A small craft for a lone pilot or a short job is a niche form of space transport.

Who is paid. Firms working in space buy it as working gear, and existing spacecraft builders could all make something so simple.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A shelter that goes up quickly serves small parties working on airless ground, a niche.

Who is paid. No user is named, so it is assumed that firms working on other worlds buy it as working gear, and a shelter that must hold air against vacuum is made by the established makers of suits and habitats, any of whom could copy it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A cheap blown-up home in orbit is assumed to be a place for many to live, a building industry of its own.

Who is paid. A settlement is a public work a government pays for, and the big construction and space firms that already win such contracts would build it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. An engine that moves ships faster or more cheaply would change the cost of all space transport.

Who is paid. An engine is bought by whoever runs the ship, assumed here to be carriers, and established engine builders could copy it once it worked.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Keeping your footing where there is little or no weight is a small convenience for those who work there.

Who is paid. Space operators buy it for their crews, and it is a simple loose item that any workshop could make.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Earthmoving gear for the Moon serves the few who build there, a niche.

Who is paid. No user is named, so it is assumed that firms working on other worlds buy it like other working gear, and established vehicle builders could all make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Cleaning dust from the air is a fitting of the habitat, needed by those who live there but not a product of its own.

Who is paid. Whoever pays for the habitat pays for this, assumed here to be a government, and any habitat builder can use the idea so the established builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is a way of flying or moving, not a product; the craft and gear that do it are judged under their own entries.

Who is paid. Nothing is sold, so nobody pays and no seller collects.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A hull that is inflated and not built rigid would make working vessels cheaper to build and launch, part of a transport industry of its own.

Who is paid. Carriers and expedition firms buy ships, and many yards could build them once shown how, so established vehicle builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A better engine sets how far, how fast and how cheaply every ship can go.

Who is paid. Whoever runs the ship pays for the engine, assumed here to be carriers, and once a firm had built it others could too, so established engine and ship builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A mirrored cloth that shades a habitat is a simple fitting, useful but not a product of its own.

Who is paid. Whoever pays for the habitat pays for this, assumed here to be a government, and it is simple enough that many firms could make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A working ship that carries people and cargo between worlds is the base of a whole transport industry.

Who is paid. Carriers and other firms working in space buy ships, and since a second yard could build the same craft the established shipbuilders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A sail pushed by light needs no fuel, which would cut the cost of slow cargo voyages between worlds.

Who is paid. Ship operators pay, and once the engine was shown to work others could build it, so established engine builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A sail pushed by light needs no fuel, which would cut the cost of slow cargo voyages between worlds.

Who is paid. Ship operators pay, and once the engine was shown to work others could build it, so established engine builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Crossing between stars without the long journey would open a transport industry of its own, the size settled for faster-than-light travel elsewhere.

Who is paid. An engine is bought by whoever runs the ship, assumed here to be carriers, and being strange does not stop established engine builders copying it once it worked.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Unlike a working ship, this sail craft is raced for sport, a costly pastime for a few.

Who is paid. Private racers buy it, and makers of sails and small craft could all build it, so established builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. It is a viewing instrument for the cramped cabin of a sail craft, a small part of a pastime vessel.

Who is paid. It follows the racing craft it is part of, so private racers pay for it within the craft, and established instrument makers supply it since others could copy the design.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. It is a handy detail of a helmet, a convenience for the few people who wear spacesuits.

Who is paid. Operators pay for it as part of the suit, and suit makers fit it themselves because any of them could copy it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A giant ship that carries whole fleets between stars would be the backbone of trade between worlds.

Who is paid. Carriers and other firms working in space buy ships, and since a second yard could build the same craft the established shipbuilders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A starship that gathers its fuel as it flies would found a transport industry between the stars.

Who is paid. Carriers and expedition firms buy ships, and many yards could build them once shown how, so established vehicle builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A place for many people to live and work beyond Earth is a building industry of its own.

Who is paid. A settlement is a public work a government pays for, and the big construction and space firms that already win such contracts would build it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A place for many people to live and work beyond Earth is a building industry of its own.

Who is paid. A settlement is a public work a government pays for, and the big construction and space firms that already win such contracts would build it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A regular ferry between the ground and orbit is the base of a whole transport industry.

Who is paid. Carriers and other firms working in space buy ships, and since a second yard could build the same craft the established shipbuilders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Pushing sail ships with a powerful laser would let them fly without carrying fuel, changing the cost of space transport.

Who is paid. Whoever runs the ships pays for the push, assumed here to be carriers, and others could build such lasers, so the owners of the power and sites collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Water dug on the Moon would supply drink, air and fuel for everything else done in space.

Who is paid. Firms that need the material pay for it, and since others could dig the same way the gain goes to those who already own the ships and claims.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Hurling cargo off the Moon without rockets would change the cost of everything built in space.

Who is paid. Firms with cargo to launch pay, and since others could build such works the gain goes to those who already own launch sites and power.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Finding the way and keeping the ship safe is essential but is an instrument within the ship.

Who is paid. Ship operators buy it as part of the craft, and the established makers of flight instruments supply it since it can be copied.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. An uncrewed probe sent to another star gathers knowledge, which is valuable but which nobody buys as a product.

Who is paid. The findings cannot be charged for, so a government pays, and the builders that already hold science contracts supply it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is a natural thing or place in space, not a product anyone makes or sells.

Who is paid. Nothing is sold, so nobody pays and no seller collects.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A small craft for short trips from a larger ship is carried aboard as part of that ship's equipment.

Who is paid. Prospectors, carriers and expedition firms buy it, and established small-craft builders could all make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A slow ship carrying people between stars is an enormous building project, assumed here to carry settlers and not paying passengers.

Who is paid. Only a government could fund a voyage with no return for so long, and the big shipbuilders and contractors already trusted with such work would be paid.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. It saves lives in a disaster, but it is safety equipment carried aboard a larger ship.

Who is paid. Ship operators pay for it as required safety gear, and shipbuilders supply it because the design is easy to copy.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A vehicle for crossing another world serves a few expeditions, a niche.

Who is paid. No user is named, so it is assumed that firms working on other worlds buy it like other working gear, and established vehicle builders could all make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Keeping your footing where there is little or no weight is a small convenience for those who work there.

Who is paid. Space operators buy it for their crews, and it is a simple loose item that any workshop could make.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A laboratory on wheels helps a research party at a site, a niche.

Who is paid. No user is named, so it is assumed that firms working on other worlds buy it like other working gear, and established vehicle builders could all make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A vessel that outruns light would found a transport industry between the stars, however it is steered.

Who is paid. Carriers and expedition firms buy ships, and many yards could build them once shown how, so established vehicle builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A transmitter announcing a claim is a cheap marker; the value lies in the claim, not the device.

Who is paid. Prospecting firms buy it, and a simple transmitter is something many firms could make.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A bare capsule for a lone traveller is a cheap niche form of space transport.

Who is paid. Carriers or expedition firms would buy it, assumed here, and existing spacecraft builders could all make something so simple.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. It is a detail of a suit, useful to the wearer but not a product by itself.

Who is paid. Space operators pay for it within the suit, and suit makers supply it because the design is easy to copy.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A network that carries messages between stars would be the only link between settled worlds, an industry of its own.

Who is paid. Those who send messages pay the network, and since others could build such craft the gain goes to whoever already runs the relays.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. It gathers knowledge about space or other worlds, which is valuable but which nobody buys as a product.

Who is paid. The findings cannot be charged for, so a government pays, and the builders that already hold science contracts supply it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A craft that carries only its pilot serves scouts and crews, a niche within space transport.

Who is paid. Prospectors, carriers and expedition firms buy it, and established small-craft builders could all make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. It protects crews during hard thrust or landing, which matters only to the few who fly such ships.

Who is paid. Ship operators pay for it as part of the craft, and the firms that already build ships and their fittings supply it since others could copy the design.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Switching weight off on the ground would let factories make things that today can only be made in orbit, and is judged as other control of gravity is.

Who is paid. Manufacturers buy the room, and once it worked other makers could copy it, so established equipment builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A board that responds to touch makes lessons and presentations a little easier.

Who is paid. Schools and offices buy it, assumed here to be bought as ordinary equipment, and any screen maker can build one.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Machines that improve from their own experience get better at factory, farm and warehouse work without being reprogrammed.

Who is paid. Firms buy them to do their work, ways of making machines learn are assumed to spread quickly among builders, and the firms that already make and sell such machines collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A material that computes the way nerve tissue does would let machines handle tasks ordinary circuits manage badly, which changes costs for the computer industry.

Who is paid. Firms that need computing pay, and I assume others could learn to grow or mix such a material in time, so the firms that already sell computing to every business collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A machine wise enough to run or remake a whole society's affairs would change how most people live and work.

Who is paid. A government pays for the single machine, and I assume whoever holds a machine that redesigns itself can use it to stay ahead of everyone copying the last one.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Small, cheap ways of keeping and carrying data are needed by every computer user and make an industry of their own.

Who is paid. Firms and their customers buy it in bulk, the idea is easy to copy, and those who already own the costly factories collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Talking to a machine or hearing it talk is a handy way to use a computer, not a new thing to do with one.

Who is paid. Firms build it into what they sell, and many can make it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Having a book read aloud is a pleasant convenience and a real help to people who cannot see well.

Who is paid. Readers buy it, and many firms can make a machine speak text, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Judged as the software and not its inventor, a moving picture on an idle screen is a small convenience.

Who is paid. Computer owners would pay little or nothing for it, and anyone can write one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A recorder for what is sensed on a far journey is a tool for a few explorers.

Who is paid. The body that sends the explorers buys it, and I assume many instrument makers could build one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A computer grown from living nerve cells that outdid ordinary chips would change the cost of computing for one industry after another.

Who is paid. Firms that need computing pay, and I assume others could learn to grow such tissue in time, so the firms that already sell computing to every business collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. An assistant built into a desk is a convenience for office workers.

Who is paid. Unlike a personal diary this is office furniture, so firms pay, and it is easy to make, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. The description gives a giant computer that solves hard problems and does not say it thinks, so I judged it as a far more powerful computer, which changes the cost of science, design and forecasting.

Who is paid. Firms and laboratories pay, and those who already own the factories for its parts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Handling court paperwork by machine saves clerks' time in one narrow service.

Who is paid. The courts pay, and the firms that already supply their record systems collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A note that speaks and argues back is an office novelty.

Who is paid. Offices would buy it, and once talking machines exist anyone can put one in a memo.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Experiences that feel like real surroundings would be an entertainment and training industry of its own, though real headsets have so far delivered less than this promise.

Who is paid. People pay for it as they pay for games and films, and since the machinery can be copied the owners of the popular worlds and stories collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. It helps a writer find persuasive words and does not write in the writer's place, so it is a handy tool and not a change in the trade's costs.

Who is paid. Writers and the firms that employ them pay, and once machines can write at all anyone can offer the same, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A tool for spoiling an enemy's records is a narrow weapon.

Who is paid. Those it harms pay nothing, so I assume a government buys it as a weapon, and since such software is easy to write the firms that already supply states with arms collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Records that vanish at their owner's death suit a few people with secrets to keep.

Who is paid. I assume firms and officials with secrets pay, and the trick is simple to build, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A therapist always at hand and cheap would reach the many people who now go without.

Who is paid. Ordinary people pay, and once machines can counsel many firms can offer it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Original verse written with no human maker would change the costs of the whole trade that now pays people to make them, which is far more than an amusement.

Who is paid. I assume the firms that now pay writers, composers and illustrators are the main buyers, though people may also order for themselves, and once the method is known many can offer it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A far more powerful computer changes the cost of science, design and forecasting.

Who is paid. Firms and laboratories pay, it is made the ordinary way rather than from a new material, and those who already own the factories for its parts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. One machine that holds and handles everything known would change how most people learn, decide and work.

Who is paid. I assume a single machine serving everyone would be built as a public work, so a government pays, and the firms that already build large computing works for governments collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A tiny simulated civilisation in a box is a marvellous plaything, assumed here to be kept for amusement.

Who is paid. People would buy it as a toy, and being hard to build does not stop a second firm building one, so I assume no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A model of everything that exists could answer any question about the world, which would change how most things are discovered and decided.

Who is paid. I assume a single machine of that size would be built as a public work, so a government pays, and the firms that already build large computing works for governments collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Computers as small as dust could be scattered to sense and report on almost anything, which is worth an industry of its own.

Who is paid. Firms and farms buy them in bulk, and since tiny chips are soon matched by rivals, the firms that already own the costly chip factories collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A character for a machine is a pleasant feature laid on top of the thinking, which is not judged here, and not the thing people mainly pay for.

Who is paid. Firms that sell machines would buy it as a feature, and once machines can talk a persona is easy for anyone to write.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A character for a machine is a pleasant feature laid on top of the thinking, not the thing people mainly pay for.

Who is paid. Firms that sell machines would buy it as a feature, and once machines can talk a persona is easy for anyone to write.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A machine that invents jokes is an amusement, a much narrower thing than machine-made songs, stories or pictures.

Who is paid. I assume ordinary people pay a little for the jokes, and once machines can write at all anyone can offer the same.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Going on existing after death is something nearly everyone would want above almost anything else.

Who is paid. People would pay all they could, and I assume a mind once kept running by one firm cannot easily be moved to another, so the first to offer it holds its customers.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A public terminal with its own data store is a convenience in places people pass through.

Who is paid. I assume the owners of public places pay, it is easy to copy, and established equipment makers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Knowing each person's tastes and acting on them changes how goods, news and entertainment are sold.

Who is paid. Sellers who want to reach the right people are assumed to pay, and the firms that already hold the audience and its records collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A networked computer in every pocket that acts as a capable aide changes how most people work, shop, talk and find their way.

Who is paid. Ordinary people buy one each, many firms can make them, and those with the factories, brands and shops collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A record of everything that happens to you is a keepsake and a memory aid, which is a convenience.

Who is paid. People buy it for themselves, and cameras and storage are made by many firms, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A machine mind as able as a person could do most kinds of work, which changes how nearly everyone earns a living.

Who is paid. Firms would pay to put it to work, and once one had been built others could learn to build their own, so I assume the firms that already own costly computing plant and sell to every business collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A handheld device that draws its worth from the network behind it is the pocket computer as it turned out, and it changes how most people live.

Who is paid. Ordinary people buy one each, many firms can make them, and those with the factories, brands and shops collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Parts that work like brain cells would make thinking machines cheaper to build and run, which is worth an industry.

Who is paid. Machine builders buy them, and I assume others could learn to make such parts in time, so the firms that already own the costly factories for electronic parts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Make-believe playmates from a computer are a toy.

Who is paid. Parents buy them for children, and I assume many toy and game firms can make them, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A keyboard that appears only when needed is a small convenience.

Who is paid. Ordinary users buy it as an add-on, and many gadget firms can make one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

No prize. A machine that hates and torments people is a hazard, not a product.

Who is paid. Nothing is sold, so there is no payer and no seller to keep anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A game that never plays the same way again is an amusement.

Who is paid. Players pay, and game designs are quickly copied, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

No prize. This is a cheating device that is outlawed, so no gaming house may lawfully buy or use it.

Who is paid. Nothing is sold, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A machine that truly thinks could do much of the mental work people do now, not only run one ship, which would change how most people work.

Who is paid. Firms would pay to put it to work, and once one had been built others could learn to build their own, so I assume the firms that already own costly computing plant and sell to every business collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A little picture standing for a file makes a computer easier to use, which is a convenience.

Who is paid. People pay for it only as part of a computer, and any software writer can draw one, so no seller keeps anything from it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A machine mind as able as a person could do most kinds of work, which changes how nearly everyone earns a living.

Who is paid. Firms would pay to put it to work, and once one had been built others could learn to build their own, so I assume the firms that already own costly computing plant and sell to every business collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A machine that can invent whole new sciences to solve a problem would change how most people live and work.

Who is paid. I assume a single machine serving everyone would be built as a public work, so a government pays, and the firms that already build large computing works for governments collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Comfort and spiritual counsel from a kiosk would be welcome to some people some of the time.

Who is paid. People pay by the visit, and once machines can talk this way anyone can set up a booth.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. This is one inner part of an artificial person and is worth only a little apart from the whole machine.

Who is paid. Builders of artificial people would buy it as a part, and I assume any parts maker could supply it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A sure verdict on whether two people suit each other for life would be wanted before almost every marriage.

Who is paid. Couples pay for a reading, and I assume that once one such machine was shown to be right others could build their own, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Cheap, compact and lasting storage for information is an industry of its own, since every computer needs it.

Who is paid. Computer makers and data keepers buy it, and because rivals soon match each design, the firms that already own the costly factories collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A service that answers any question from all recorded knowledge is worth an industry of its own.

Who is paid. I assume the people who ask pay for the answers, as they would for any service they use themselves, and that the service with the most users learns most from their questions, which others cannot get.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A lit dome that shows maps is a piece of planning equipment for a few users.

Who is paid. Assuming it is used by military staff as in the story, a government pays, and the firms that already supply armies with such equipment collect because it is easy to copy.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A metal surface that forms words on itself is a sign or noticeboard of an unusual kind.

Who is paid. Offices would buy it as a display, and ordinary screens that many firms make do the same job, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Entertainment that fills every sense would be a new industry beside cinema and games.

Who is paid. Assuming people pay at the door of a venue, others could build such centres once one existed, so the entertainment firms that own the stories and the sites collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A shop for digital books changes what it costs to publish, ship and store books.

Who is paid. Readers buy the books, anyone could open such a shop, and the publishers who own the right to the books collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A touch-sensitive paper map is a handy travel aid.

Who is paid. Travellers buy it, the touch-sensitive pages are thin screens that can be copied, and the display makers with the factories collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A handheld screen holding many books or the day's paper is worth an industry and cuts the cost of printing and delivery.

Who is paid. Ordinary people buy it; the device is easy to copy, so the publishers and shops that already own the books and papers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Portable recording and sending kit is a useful tool for one trade.

Who is paid. News firms buy it and many makers can build such kit, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Broadcasts with real depth would be the next kind of television set and worth an industry, though the real thing has so far sold poorly against the promise.

Who is paid. Households buy the sets, and since any electronics factory could copy the design, the firms that already own the factories, brands and shops collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Broadcasts with real depth would be the next kind of television set and worth an industry, though the real thing has so far sold poorly against the promise.

Who is paid. Households buy the sets, and since any electronics factory could copy the design, the firms that already own the factories, brands and shops collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. News printed at home is a convenience over a paper brought to the door.

Who is paid. Readers pay for the service, and since the printer is easy to make, the news firms that already have the reporters and readers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A camera that sends pictures straight to the newsroom saves the press some hours, a narrow gain.

Who is paid. News firms buy it, and since many can make such a camera, no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Calls paid for by listening to advertisements save callers a little money.

Who is paid. Advertisers pay in place of the callers, any phone firm could offer it, and the firms that own the phone networks collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A light-hearted news show is one more programme among many.

Who is paid. I assumed viewers pay; anyone can present a show, so the broadcasters who already hold the channels collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A pretend shooting gallery is a niche amusement.

Who is paid. Players pay and many firms can build one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Signs that truly made passers-by buy without knowing why would change what sellers spend to win customers.

Who is paid. Firms with goods to sell pay for the space, and since the hidden message is easy to copy, the owners of the roadside sites collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Changing what politicians appear to say on your own set is a toy, and a troubling one, not a need.

Who is paid. Viewers would buy it as a novelty feature and any set maker could add it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A sound recorder made of living tissue does the same job as any other recorder, so it is a curiosity.

Who is paid. People would buy it as a recorder like any other, and ordinary recorders that many firms make hold its price down, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A tiny flying machine that pesters people with advertisements is one more way to advertise, and an unwelcome one.

Who is paid. Advertisers pay, and once such fliers exist anyone can send them out, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A projected sign on a door is decoration, unlike a full display with depth.

Who is paid. Shops and offices buy it as signage and many sign makers could supply it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A link you tap for more detail is a handy feature inside documents, not a product on its own.

Who is paid. Firms that make reading software build it in, and since anyone can add such a link, no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A comic whose pages move is a novelty for readers.

Who is paid. Readers buy it, the moving page is easy to copy, and the publishers who own the popular characters collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A spoken code for one army is useful to that army alone.

Who is paid. A government pays to have it devised and taught, and a language cannot be owned and any group of linguists could make one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A network open to everyone for sharing information changes how most people work, shop and talk.

Who is paid. Households pay for a connection, the method is open for anyone to use, and the firms that own the wires and masts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Hiding a message in a bat or bird is a tool for spies and smugglers.

Who is paid. Assuming spy services are the buyers, a government pays, the story treats it as a common device others could make, and the firms that already supply such services collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A lifelike moving portrait is a keepsake.

Who is paid. Families buy it, and anyone with the equipment could make such portraits, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A very small, light book matters only where every bit of weight counts.

Who is paid. Unlike an electronic book, this is still a printed book on thin material, which travellers buy and any printer could make, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Books and film kept in one compact form change what it costs to publish, ship and store them.

Who is paid. Readers buy them, the storage medium is easy to copy, and the publishers who own the right to the contents collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Talking from car to car is a convenience for drivers.

Who is paid. Drivers buy it with the car, and it is easy to copy, so the established carmakers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A compact way to carry a message or recording is a niche tool.

Who is paid. I assumed firms and officials buy it; many makers could produce it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A compact way to carry a message or recording is a niche tool.

Who is paid. I assumed firms and officials buy it; many makers could produce it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Seeing yourself in different outfits on a screen is a sales aid for clothes shops.

Who is paid. Shops buy it, a screen and camera can be copied, and the electronics firms with the factories collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A compact way to carry a message or recording is a niche tool.

Who is paid. I assumed firms and officials buy it; many makers could produce it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A picture with true depth standing in the room would replace the flat screen and be worth an industry of its own; the real thing so far is smaller than this promise.

Who is paid. Households buy the sets, and since any electronics factory could copy the design, the firms that already own the factories, brands and shops collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Assuming people live around many stars, instant messages between them would be the backbone of all trade and rule across space, an industry of its own.

Who is paid. Assuming it needs great stations and not a pocket set, firms and governments with far-flung operations pay for the traffic, others could build the device once it is known to work, and the carriers whose networks feed the stations collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Showing a personal device on a big shared screen is a handy feature.

Who is paid. It comes as a feature of devices people already buy and any maker can add it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A stored list of callers is a handy feature of a phone.

Who is paid. It comes as a feature of phones people already buy and any maker can add it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Spoken messages kept for later are a handy feature of phone service.

Who is paid. Callers pay for it as part of their phone service, it is easy to copy, and the firms that own the phone networks collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A short name that stands for a full identity and number is a convenience.

Who is paid. Phone users pay; the idea is easy to copy, so the network firms that already hold the directory collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Feeling a far-off partner's touch is a novelty for couples who are apart.

Who is paid. Couples would buy it for themselves, and since many could make such a gadget, no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Stepping into a simulated scene with no headset would be a new form of entertainment worth an industry; the real thing so far is smaller than this promise.

Who is paid. Households pay for the equipment and the scenes, and since the projector could be copied, the firms that already own the studios and electronics factories collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Simulated games played for fun are one of the biggest forms of entertainment.

Who is paid. Players buy the games, and since the idea is open to all, the studios that already own popular titles and the machines they run on collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Speaking to a phone instead of pressing keys is a convenience added to something people already own.

Who is paid. It comes as a feature of phones people already buy and any maker can add it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Speaking to a phone instead of pressing keys is a convenience added to something people already own.

Who is paid. Spoken control comes as a feature of phones people already buy and any maker can add it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A handheld screen holding many books or the day's paper is worth an industry and cuts the cost of printing and delivery.

Who is paid. Ordinary people buy it; the device is easy to copy, so the publishers and shops that already own the books and papers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A handheld screen holding many books or the day's paper is worth an industry and cuts the cost of printing and delivery.

Who is paid. Ordinary people buy it; the device is easy to copy, so the publishers and shops that already own the books and papers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A picture with true depth standing in the room would replace the flat screen and be worth an industry of its own; the real thing so far is smaller than this promise.

Who is paid. Households buy the sets, and since any electronics factory could copy the design, the firms that already own the factories, brands and shops collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Assuming it only records a world's history and does not foretell it, a chronicle that keeps itself up to date is a reference work for the curious.

Who is paid. Assuming readers buy copies, there is only this chronicle and only its keepers can write it, so they keep what readers pay.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. News put together with no human editors removes the main cost of the news trade.

Who is paid. Assuming a machine readers buy or subscribe to, once machines can write the news anyone can run one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. News sorted to each reader's interests changes how the news trade reaches people.

Who is paid. Readers pay by subscription; the sorting is easy to copy, so those who already hold the reporting and the audience collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. This is a creature's nature or a state of mind, not something made and sold.

Who is paid. Nothing is sold, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A thin screen for the wall is the form nearly every display now takes and is an industry of its own.

Who is paid. Households buy the sets, and since any electronics factory could copy the design, the firms that already own the factories, brands and shops collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A picture with true depth standing in the room would replace the flat screen and be worth an industry of its own; the real thing so far is smaller than this promise.

Who is paid. Households buy the sets, and since any electronics factory could copy the design, the firms that already own the factories, brands and shops collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Finding a socket and plugging itself in is a handy feature of a robot, and the real thing exists.

Who is paid. Owners pay for it within the price of the machine, and any maker could include it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A powered boost when leaping is a niche aid, useful mainly where the pull of gravity is weak.

Who is paid. It is assumed that people buy it for themselves, and many makers could build such a pack.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Machines that bring goods to the door would cut the cost of the last step of delivery for every shop.

Who is paid. Shops and carriers buy them, and since the machines are easy to copy the vehicle and equipment makers that already supply those carriers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Tiny robots that burrow through soil are given no job, so they are assumed to be for loosening and testing ground, a niche.

Who is paid. Farmers and survey firms are assumed to buy them, and many makers could build such burrowers.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A machine that shelves library books saves a little labour in a narrow setting.

Who is paid. Libraries are assumed to buy it as any organisation would, and many makers could build such a machine.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A machine that waits on people is judged as a robot waiter, which would remove much of the labour cost of serving meals; the description does not say where it serves.

Who is paid. Restaurants and dining halls are assumed to buy it, and since many could build one the catering-equipment makers with service networks collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Farm machines that work fields with nobody driving would cut the labour cost of growing food across farming.

Who is paid. Farmers buy them, and since many could build them the farm-equipment makers with dealers and repair networks collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A vending machine that seeks out buyers is a small improvement in selling papers.

Who is paid. News sellers buy it, and such a machine is easy to copy.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Digging and hauling with no crew would cut the cost of mining and earthworks.

Who is paid. Mining and building firms buy them, and the heavy-equipment makers who already supply those firms can copy the idea and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Kitchens that make meals with no human handling would change the costs of the whole food trade.

Who is paid. Kitchen operators buy the machinery, and since many could build it the catering-equipment makers with service networks collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Judged as the farm machine it is, since its use as a weapon is a turn of the story: ploughing with nobody driving would cut the labour cost of growing food.

Who is paid. Farmers buy them, and since many could build them the farm-equipment makers with dealers and repair networks collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A drone that trails people who owe money is a narrow tool for debt collectors.

Who is paid. Lenders and collectors pay, and such a floater is easy for many makers to build.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A boxed family of android neighbours for lonely homes is company sold as a product, worth an industry of its own.

Who is paid. People buy it for themselves, and as many could make such machines the firms with factories and well-liked brands collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A robot private investigator serves a narrow trade.

Who is paid. Detective firms buy it, and many makers could build such a machine, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A robot that gathers and files news serves a narrow trade.

Who is paid. News firms buy it, and many makers could build such a machine, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A robot that clears tables takes over a single job in the restaurant trade, a convenience and not a whole premises run with no staff.

Who is paid. Restaurant owners buy it, and such a machine is easy for many makers to copy, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A robot that asks the questions for a news story saves a reporter some time, a niche.

Who is paid. News firms buy it, and many makers could build such a machine, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A mobile plant that sifts a valuable substance from sand makes a whole mining trade possible.

Who is paid. Mining houses buy the plants, and heavy-equipment makers can copy them, though whoever holds the right to dig would keep far more than any plant maker.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A sparring machine for fencing practice is a niche training aid.

Who is paid. Fighters and their families buy it, and many makers could build a like machine.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A robot pack animal that carries loads is a niche where roads do not reach.

Who is paid. Whoever needs goods moved across open country pays, and such a machine is simple enough for many to build.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A bar counter that pours the drinks itself takes over the barman's job, a convenience for a narrow trade.

Who is paid. Bar owners buy it, and a drink-mixing machine is easy for many makers to copy, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A timed mechanism that does simple chores saves a little work in the home, a convenience.

Who is paid. Households buy it, and many makers could build such a device, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A bear given to every child to shape what they value is a tool of upbringing on the scale of schooling, assuming the state hands it out.

Who is paid. The state is assumed to pay since every child gets one, and the firms that already supply schools and toys collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A stake that draws giant desert creatures by hammering is useful only on the world where they live.

Who is paid. Travellers and harvesting crews there are assumed to buy it, and anyone could make so simple a device.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Collecting and sorting rubbish by machine would cut what every town spends on waste.

Who is paid. Towns pay through their waste budgets, and the firms that already hold collection contracts would buy the machines and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A robot that chases debtors serves a narrow trade.

Who is paid. Lenders and collectors pay, and such a machine is easy for many makers to build.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A robot to wrestle against is a tireless practice partner, a convenience for those who train.

Who is paid. Players and gyms are assumed to buy it much like sports gear, and many makers could build one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Building itself from parts and starting up is a useful feature of a robot, not a product by itself; nothing says it makes copies.

Who is paid. Owners pay for it within the price of the robot, assumed here to be a working machine bought by firms, and any maker could include it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Farm machines that steer themselves cut the labour cost of working fields across farming.

Who is paid. Farmers buy them, and since many could build them the farm-equipment makers with dealers and repair networks collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. The description gives a mechanical spider no job, so it is judged as a niche crawling machine.

Who is paid. Firms with odd jobs for it are assumed to buy it, and many makers could build one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Extremely small robots are assumed here to do fine work inside goods or bodies, enough for an industry of its own.

Who is paid. Firms buy them for their work, and as nothing says they cannot be copied the makers with precision factories collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A machine made for tunnelling would cut the cost of mining and earthworks.

Who is paid. Mining and building firms buy them, and the heavy-equipment makers who already supply those firms can copy the idea and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A cutoff that briefly stops an artificial human is a safety feature, valued only as part of the machine.

Who is paid. Firms that own such machines pay for it in the price, and any maker of the machines can fit it, so nothing more is kept for it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. This is only a slang word, so it is judged as the thing it names, assumed to be a humanlike machine that could do most human work.

Who is paid. Firms buy them as labour, and since many could build such bodies once shown how, the large manufacturers with factories and service networks collect what is left.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Making a robot pet act sick when it needs repair is a small touch that keeps up the pretence of a living animal.

Who is paid. Owners pay for it within the price of the pet, and any maker of such pets could add it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. An imitation animal is a comfort or a show of standing, not a need.

Who is paid. Households buy it much like a toy, and many workshops could make one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. An imitation animal is a comfort or a show of standing, not a need.

Who is paid. Households buy it much like a toy, and many workshops could make one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Repairing mechanical pets is a small service trade that follows the pets.

Who is paid. Pet owners pay, and any trained repairer can set up shop, so nobody keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A newer model of manufactured humanlike being is assumed to be the artificial person of the stories, able to do most kinds of human work.

Who is paid. Firms buy them as labour, and since many could build such bodies once shown how, the large manufacturers with factories and service networks collect what is left.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A routine that makes a robot pet come to food is a touch of realism, valued only as part of the pet.

Who is paid. Owners pay for it within the price of the pet, and any maker of such pets could add it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A manufactured being that works like a human could do most kinds of human work, which would change how most people work.

Who is paid. Firms buy them as labour, and since many could build such bodies once shown how, the large manufacturers with factories and service networks collect what is left.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Putting itself back together after being broken is a useful feature of a robot, not a product by itself.

Who is paid. Owners pay for it within the price of the robot, assumed here to be a working machine bought by firms, and any maker could include it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Robot scouts sent ahead into unknown ground spare explorers some danger, a niche use.

Who is paid. Exploring agencies and armies pay, and the firms that already build their craft would supply the scouts.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A city that repairs and defends itself for ages would be a great public work, judged as built for one people only.

Who is paid. A government would pay for it, and the large builders that already win public works contracts would be paid to raise it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. The description gives this creature of tissue and machine no job, so it is judged as a general working machine that would change how most people work.

Who is paid. Firms buy them as labour, and since many could build such bodies once shown how, the large manufacturers with factories and service networks collect what is left.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A robot that looks after children would be worth an industry of its own to families.

Who is paid. Families buy it, and since they are assumed to trust only known names with their children the established makers with strong brands collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Machines that tunnel to find passages underground are a survey tool for a few trades.

Who is paid. Survey and exploring firms are assumed to buy them, and many makers could build such a burrower.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A mechanical horse that is loyal to its rider is a companion and a mount for those who want one, not a need.

Who is paid. Households buy it much like an imitation animal, and many workshops could make one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Soft covers that quiet a mechanical horse's steps are a small feature of the animal.

Who is paid. Owners pay for them within the price of the horse, and anyone could make them.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Lifelike flesh in place of hard plastic is a finish that makes a robot pleasant to look at and touch, a feature.

Who is paid. Robot makers pay for it as a part of the machines they sell to firms, and any of them could fit it, so nothing extra is kept.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A clever toy bear that keeps a child company is a toy, however well loved, not a need.

Who is paid. Parents buy it much like any toy, and many makers could build one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Man-made skin helps people with burns and bad wounds, which is an important but narrow part of medicine.

Who is paid. Hospitals and clinics would buy it, and the firms that already supply wound dressings could all make it, so they collect a modest margin.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Keeping an operating area free of germs is useful, but other ways of doing it already exist.

Who is paid. Hospitals would buy it, and germ-killing lamps are simple things many firms can make, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Putting people safely into long dormancy would make very long journeys possible and give hospitals time to treat the gravely ill.

Who is paid. I assumed carriers and hospitals buy it; the method could be copied once known, so the firms that already run ships and hospitals collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A pump that stands in for the heart for a short while serves certain operations, a narrower use than a lasting replacement organ.

Who is paid. Hospitals would buy it, and several equipment makers can build such pumps, so established makers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A pod that passes its dose through the skin is a handy way of taking a medicine, not a new medicine.

Who is paid. Patients would buy it, and any drug firm can put its medicines in such a pod, so established drug makers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

No prize. This is a living creature in the story, not a technology anyone makes and sells.

Who is paid. Nothing is sold, so no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Regrowing lost or ruined tissue would change what hospitals can do for the badly injured.

Who is paid. I assumed hospitals buy and run it; once it worked other makers could copy it, so established medical equipment firms and hospitals collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Staying sober while drinking is a convenience for drinkers, not a need.

Who is paid. Drinkers would buy it for themselves, and a new drug is protected from copying for a while, so its maker keeps what is left.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Putting people safely into long dormancy would make very long journeys possible and give hospitals time to treat the gravely ill.

Who is paid. I assumed carriers and hospitals buy it; the method could be copied once known, so the firms that already run ships and hospitals collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. An instant home answer on pregnancy is a real convenience, though each buyer needs it only now and then.

Who is paid. People buy it for themselves in ordinary shops, and many firms can make such strips, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Replacement organs on demand would end the wait for donors and support an industry of their own.

Who is paid. Patients would pay, mostly through insurers or health services, and other firms could copy the design, so the established makers of medical implants and the hospitals that fit them collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A passing change of skin colour is decoration, not need.

Who is paid. People would buy it for themselves, and many makers of cosmetics could offer it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A machine hand that operates would cut the cost and raise the precision of surgery.

Who is paid. I assumed hospitals and clinics buy it; several firms could build it once it worked, so established medical equipment makers and hospital groups collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. The description calls it old-style, but it still puts people into long dormancy, which would make very long journeys possible.

Who is paid. I assumed carriers and hospitals buy it; the method could be copied once known, so the firms that already run ships and hospitals collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A machine that diagnoses and operates without a doctor would bring skilled care to nearly everyone and remake medicine.

Who is paid. I assumed hospitals and clinics buy it; with the needed machine intelligence widely available several firms could build it, so established medical equipment makers and hospital groups collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. The name is of the person, so the thing judged is the therapy that enlarges the front of the brain, which I assumed sharpens the mind and so would be wanted by a great many people.

Who is paid. People would pay for it themselves, and I assumed other clinics could learn the therapy, so established clinics collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is done to a person without their say, to hurt them, break their mind or override their will or body, which no one may lawfully buy or use.

Who is paid. Assuming it is outlawed for everyone, governments and employers included, nothing is sold.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Teeth fixed for good in the jaw are wanted by a great many people who lose their own.

Who is paid. Patients pay, and many firms make the parts and dentists everywhere can fit them, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Hands made for particular tasks help people who have lost a hand, and they are a small share of everyone.

Who is paid. Patients would pay, mostly through insurers or health services, and several firms could build such limbs, so established makers of artificial limbs collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Restoring sight with an implanted eye would be worth an industry.

Who is paid. Patients pay, with insurers behind them, and makers of medical implants collect since rivals could copy the eye.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A robot that keeps the injured alive would change emergency care.

Who is paid. Ambulance services and hospitals pay, and makers of medical equipment collect since the robot can be copied.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. The description promises nothing beyond what ordinary stimulant drinks already give, so it adds a convenience.

Who is paid. Drinkers would buy it for themselves, and stimulants of this kind are old and made by many, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Teeth fixed for good in the jaw are wanted by a great many people who lose their own.

Who is paid. Patients pay, and many firms make the parts and dentists everywhere can fit them, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Rousing a sleeper at once is a narrow use beside staying awake for long stretches.

Who is paid. I assumed people buy it for themselves; stimulants of this kind are old chemistry many firms can make, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A calming puff from a phone is a convenience added to something people already carry.

Who is paid. People would buy it as part of a phone, and any phone maker could add it, so established phone makers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Skin that feels touch adds sensation to man-made skin, which stays a narrow part of medicine.

Who is paid. I assumed hospitals and makers of artificial limbs buy it; other materials firms could copy it, so established suppliers collect a modest margin.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. The name is of the person, so the thing judged is the freezing and keeping of the dead, and the description promises only a hope of revival, which few would pay much for.

Who is paid. Families would pay for the keeping, and other firms could freeze and store bodies too, so established funeral firms with premises and trust collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Bringing back people who have just been killed would change emergency medicine.

Who is paid. I assumed hospitals and duelling grounds buy the equipment; other makers could copy it, so established medical equipment firms collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Ornaments under the skin are fashion.

Who is paid. Wearers would buy them, and many workshops could make and fit them, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Black false teeth are a fashion, which sets them apart from plain replacement teeth.

Who is paid. Wearers would buy them, and any dental workshop can make them, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Storing the frozen and bringing them back would be worth an industry of its own.

Who is paid. Families pay for the keeping, and firms that already run death care and cold storage collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Needing less sleep would be wanted by most workers, though the drug only trims the need.

Who is paid. People pay for the drug, and the developer keeps the gain because a new medicine is protected from copying.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A chamber for one kind of therapy serves a narrow group of patients.

Who is paid. I assumed clinics buy it; the chamber could be copied, so established makers of clinic equipment collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Colouring the body is decoration, not need.

Who is paid. People would buy it for themselves, and dyes are easy for many firms to make, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Arms made for particular jobs help people who have lost an arm, and they are a small share of everyone.

Who is paid. Patients would pay, mostly through insurers or health services, and several firms could build such limbs, so established makers of artificial limbs collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A longer life meets about the deepest need there is, and nearly everyone alive would want it.

Who is paid. People would buy it for themselves, and I assumed it is protected like a new medicine, so its maker keeps much of the gain.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A robot that operates by itself would cut the cost of surgery, though it changes only that part of medicine.

Who is paid. I assumed hospitals and clinics buy it; several firms could build it once it worked, so established medical equipment makers and hospital groups collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. The name is of the person, so the thing judged is the treatment that lets someone reshape their own face, which serves a narrow trade in spying.

Who is paid. I assumed spy services are the buyers, so a government pays; the description does not say the method is a secret, so the firms that already hold such contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A replacement joint matters greatly to people who need it, but they are a small share of everyone.

Who is paid. Patients would pay, mostly through insurers or health services, and several firms could build such joints, so established makers of artificial limbs and joints collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Giving even partial sight back to blind people is worth an industry of its own, though most people would never need it.

Who is paid. Patients would pay, mostly through insurers or health services, and once the design was known other device makers could copy it, so established implant makers and eye clinics collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A dressing that closes wounds cleanly helps hospitals and fitters of implants, which is a narrow part of medicine.

Who is paid. Hospitals and clinics would buy it, and the firms that already supply wound dressings could all make it, so they collect a modest margin.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Hands for dolphins serve a very small group of users.

Who is paid. I assumed firms and researchers who work with dolphins buy them; simple gripping tools can be made by many, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. The thing named is the theft of organs from unwilling people, a crime with victims and not a product, and replacement organs themselves are judged elsewhere in this category.

Who is paid. Nothing is sold that a buyer may have, unlike a street drug its users choose to buy, so no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A fresh healthy body for the same mind answers the deepest need there is, and nearly everyone would want it.

Who is paid. People would pay for themselves; I assumed it is a procedure other clinics could learn and not a protected drug, so established hospitals collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. The name is of a place, so the thing judged is the service it offers, which matters deeply to the few who seek it but is narrow.

Who is paid. The person or family would pay, and I assumed the law would let only a few approved providers offer it, so those providers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Machines in the blood that clear out germs would spare nearly everyone from infectious illness.

Who is paid. Patients would pay, mostly through insurers or health services, and unlike a single protected medicine a machine can be built another way by rivals, so established drug and device makers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Organs grown to order would end the wait for donors and support an industry of their own.

Who is paid. Patients would pay, mostly through insurers or health services, and other firms could copy the design, so the established makers of medical implants and the hospitals that fit them collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A holder for pills on a support frame is a minor fitting.

Who is paid. Wearers would buy it, and anyone can make a small container, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. As described it helps a small group of people raised in low gravity to move about.

Who is paid. Wearers would buy it, and several firms could build powered frames, so established makers of mobility aids collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Putting people safely into long dormancy would make very long journeys possible and give hospitals time to treat the gravely ill.

Who is paid. I assumed carriers and hospitals buy it; the method could be copied once known, so the firms that already run ships and hospitals collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Replacement organs on demand would end the wait for donors and support an industry of their own.

Who is paid. Patients would pay, mostly through insurers or health services, and other firms could copy the design, so the established makers of medical implants and the hospitals that fit them collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Finding a vein without guesswork is a small convenience for nurses and patients.

Who is paid. Hospitals and clinics would buy it, and it is a simple device many firms can make, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Regrowing lost or ruined tissue would change what hospitals can do for the badly injured.

Who is paid. I assumed hospitals buy and run it; once it worked other makers could copy it, so established medical equipment firms and hospitals collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Letting families go on speaking with the newly dead is something a great many would pay for.

Who is paid. Families would pay for the keeping, and I assumed the chambers can be copied, so established funeral firms with premises and trust collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Eating freely without gaining weight is something a great many people would pay for.

Who is paid. People would buy it for themselves, and I assumed it is sold as a medicine and protected from copying for a while as new medicines are, so its maker keeps much of the gain.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A machine that identifies and treats nearly any illness would bring skilled care to nearly everyone and remake medicine.

Who is paid. I assumed hospitals and clinics buy it; with the needed machine intelligence widely available several firms could build it, so established medical equipment makers and hospital groups collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Diagnosing patients without a physician would cut the cost of medicine, though unlike a full robot doctor it does not treat.

Who is paid. I assumed hospitals and clinics buy it; with the needed machine intelligence widely available several firms could build it, so established medical equipment makers and hospital groups collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. The name is of the person, so the thing judged is the engineering that lets a person change appearance and pass as someone else, which serves a narrow trade in spying.

Who is paid. I assumed spy services are the buyers, so a government pays; the description does not say the method is a secret, so the firms that already hold such contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. The name is of the person, so the thing judged is the regrowing of a dead person from kept cells, which many bereaved families would pay dearly for.

Who is paid. I assumed families pay and that other laboratories could learn the method once it worked, so established fertility and tissue laboratories collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Keeping the dead within reach of their families would be worth an industry of its own.

Who is paid. Families pay for the keeping, and firms that already run death care and cold storage collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Changing your face at will would be worth a large part of the beauty trade.

Who is paid. People pay, and established cosmetic clinics and brands collect since the method can be copied.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Giving sight back to blind people is worth an industry of its own, though most people would never need it.

Who is paid. Patients would pay, mostly through insurers or health services, and once the design was known other device makers could copy it, so established implant makers and eye clinics collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A calming drug in chewing gum is an ordinary medicine in a handy form.

Who is paid. People would buy it for themselves, and calming drugs of this kind are old and many firms can make them, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Cleaning skin of germs is useful, but other ways of doing it already exist.

Who is paid. Hospitals and laboratories would buy it, and germ-killing lamps are simple things many firms can make, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A people born without the urge to violence would be safe from each other, which changes how nearly everyone lives.

Who is paid. It only works if every child gets it, so the state would pay, and the medicine firms that already supply public health would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A disc that shows how the wearer feels is a novelty with some social use.

Who is paid. Unlike the instrument for clinics this is worn by ordinary people, who would buy it themselves, and it is easy to copy, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is done to a person without their say, to hurt them, break their mind or override their will or body, which no one may lawfully buy or use.

Who is paid. Assuming it is outlawed for everyone, governments and employers included, nothing is sold.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is done to a person without their say, to hurt them, break their mind or override their will or body, which no one may lawfully buy or use.

Who is paid. Assuming it is outlawed for everyone, governments and employers included, nothing is sold.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Direct stimulation of the reward centres would draw a large and steady demand, as strong drugs do.

Who is paid. Users would buy it for themselves, legal or not, and it is simple enough that many makers could supply it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Sending minds out to faraway planets would open exploration and trade in what they find.

Who is paid. I assume exploring firms would buy the machine; it could be copied, and it works only with gifted minds, so the gain goes to those rare operators as pay and not to any seller.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. I assume it is a toy set whose escape happens in the players' own heads, which makes it a pastime.

Who is paid. Players would buy the dolls and fittings themselves, and since any workshop could make them the toy sellers with known names and shops would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Company called up from imagination would comfort the lonely, but as a learned technique it would reach only those able to master it.

Who is paid. The description names a technique that was learned, so I assume it can be taught; learners would pay teachers, and any teacher could pass it on, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Sleep on command would be worth an industry of its own to the many people who sleep badly.

Who is paid. People who sleep badly would buy it for themselves, and the gear is simple enough for many makers to copy, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Spreading calm and a sense of truth among many people would be worth a great deal to those who keep the peace.

Who is paid. Nobody could be charged for calm, so I assume a government pays; the object alone does nothing without a gifted holder, so no maker can corner it and the state's usual suppliers would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Sharing one person's feelings with many others is a religious or social comfort for those who want it.

Who is paid. Believers would buy the box for themselves, and a simple box is easy to copy, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A drug that lets people share an escape into fantasy would sell like any strong vice; the story bans it, but I judged it as if sold.

Who is paid. Users would pay for it themselves, and a drug is easy for others to make once known, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A cure for one unhappy love is a comfort for a few.

Who is paid. The lovesick would pay for it themselves, and once the machine worked others could copy it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

No prize. It is done to a person without their say, to hurt them, break their mind or override their will or body, which no one may lawfully buy or use.

Who is paid. Assuming it is outlawed for everyone, governments and employers included, nothing is sold.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A training that lets a person reason like a computer would be worth an industry of schools, though only for those able to finish it.

Who is paid. Students would pay for the training themselves, assuming it can be taught to those who apply, and any school could copy the method, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A signal that makes lessons stick would speed up schooling, but the learner still sits through the recording at an ordinary pace.

Who is paid. Learners and families would buy the recordings themselves, and any publisher could add such a signal once it was known, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is done to a person without their say, to hurt them, break their mind or override their will or body, which no one may lawfully buy or use.

Who is paid. Assuming it is outlawed for everyone, governments and employers included, nothing is sold.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A drink that sharpens thinking would be wanted by everyone whose work is mental.

Who is paid. People would buy it for themselves as they buy any stimulant, and many makers could brew it once the recipe was known, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A drug and music that give a deep altered state would draw a large and steady demand, as strong drugs do.

Who is paid. Users would buy it for themselves, legal or not, and it is simple enough that many makers could supply it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. The story prizes it above every other resource, and judged on that promise most people who could afford it would want it.

Who is paid. I assume people buy it to take themselves and that it cannot be grown or made anywhere else, which the description implies but does not say; whoever holds the only world it comes from controls something others cannot get and keeps what is left.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A voice that compels obedience works only on those within hearing, so it controls a few people at a time.

Who is paid. I assume a state would pay to train its agents in it, and though it is a technique its usual suppliers and schools would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. This names a person, but the link behind it, a mind wired into a machine, is a better set of controls where hand controls already do the job.

Who is paid. Firms that run the machines would buy it, and once one maker had the link others could copy it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Talking with the stored minds of the dead is precious to the bereaved, but the worth lies in storing the mind, and this is only the telephone to it.

Who is paid. Families would pay, and I assumed the stored minds already exist, so the talking device alone is easy to copy and no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A therapist who can enter and shape dreams could treat troubles of the mind that talk alone does not reach.

Who is paid. Clinics and therapists would buy the machine, and the makers of medical equipment who already sell to them could copy it and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Removing chosen memories would treat trauma and grief for a great many people, worth an industry of its own.

Who is paid. Patients would pay, the method could be copied once known, and the clinics and medicine firms already trusted with such care would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Memories of a holiday or adventure never taken would stand in for travel and film at far lower cost.

Who is paid. Ordinary people would pay for each memory, the method could be copied, and the leisure firms that own the stories and the names people know would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Telephones already carry words between people, so sending thoughts instead is a convenience.

Who is paid. People would buy it for themselves, and once it existed many makers could copy it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is ordinary natural memory, which everyone already has and nobody sells.

Who is paid. Nothing is made or sold here, so there is no buyer and no seller.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Pleasure on demand from a current in the brain would draw as many buyers as any vice, harmful as the story shows it to be.

Who is paid. Users would pay for it themselves, and a wire and a small current are simple to make, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is done to a person without their say, to hurt them, break their mind or override their will or body, which no one may lawfully buy or use.

Who is paid. Assuming it is outlawed for everyone, governments and employers included, nothing is sold.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Choosing how to feel at home would stand in for much of what people now seek from drink, pills and therapy.

Who is paid. Households would buy it as a home appliance, and many makers could copy it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Choosing how to feel would stand in for much of what people now seek from drink, pills and therapy.

Who is paid. Households would buy it as a home appliance, and many makers could copy it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Passing thoughts to others by machine is a new way to talk, and speech and telephones already do the job for nearly everyone.

Who is paid. Ordinary people would buy it for themselves, and once one maker could decode thought others could copy it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. This is the plug-in part of the pleasure implant, and I judged it with the implant: pleasure on demand would draw as many buyers as any vice, harmful as the story shows it to be.

Who is paid. Users would pay for it themselves, and a wire and a small current are simple to make, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Pleasure on demand from a current in the brain would draw as many buyers as any vice, harmful as the story shows it to be.

Who is paid. Users would pay for it themselves, and a wire and a small current are simple to make, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Writing a book straight into memory would replace years of study for most people.

Who is paid. Learners and families would pay for it themselves, and once a first firm had built it others could copy it and many could supply the lessons, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Talking with relatives kept in cold storage is a comfort for the bereaved and little more.

Who is paid. Families would pay to hear from their own kin, and the amplifier could be copied by many makers, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Making a staged scene feel wholly real would be an entertainment industry of its own.

Who is paid. People would buy it for themselves, and since the method could be copied the owners of the stories, stars and channels people already follow would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is done to a person without their say, to hurt them, break their mind or override their will or body, which no one may lawfully buy or use.

Who is paid. Assuming it is outlawed for everyone, governments and employers included, nothing is sold.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A tool that reads the thoughts of whoever it is pointed at would change how crimes are solved and secrets are kept.

Who is paid. The holder reads another person, so I judged it as a probe and assumed police and spy services are the main buyers, though private buyers would want it too; a handheld tool could be copied, so the firms that already supply those services would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A vehicle for crossing lunar dust serves only the few people who are on the Moon.

Who is paid. Operators of lunar bases and tours buy it, and any builder of space vehicles could make it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A vehicle for crossing lunar dust serves only the few people who are on the Moon.

Who is paid. Operators of lunar bases and tours buy it, and any builder of space vehicles could make it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A field that keeps everyone in a vehicle unhurt in any collision does far more than the cushions and bags beside it, which only soften a crash, and ending injury on the roads would change the costs of motoring, insurance and emergency care.

Who is paid. Owners pay for it through the price of the vehicle, and I assume that once the field is shown to work other firms could build it, so the established vehicle makers fit it and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Sending things instantly across any distance would replace most shipping and haulage, which changes how most people are supplied and how most firms work; this one sends people too.

Who is paid. I assume carriers and traders pay to send people and goods through, and once a firm had built it others could, so the carriers and builders that already own the depots, the ports and the customers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. It prevents some crashes, but it is a safety feature in a car rather than something people seek out.

Who is paid. Drivers pay for it with the car, often because the law requires it, and the car makers and their parts suppliers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. Cheap instant passage between worlds would open new land and trade to a large share of humanity; I assume the relay post holds the machine that passes travellers on, so it is judged as the gate and not as a building.

Who is paid. I assume carriers and traders pay to send people and goods through, and once a gate is built others could build more, so the large builders and carriers that already own the ports and the customers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Cheap instant passage between worlds would open new land and trade to a large share of humanity.

Who is paid. I assume carriers and traders pay to send people and goods through, and once a gate is built others could build more, so the large builders and carriers that already own the ports and the customers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A system that flies the aircraft changes the crew costs and the safety of the whole airline industry.

Who is paid. Airlines and aircraft builders buy it, and the firms already trusted to supply flight controls collect because a newcomer cannot easily win safety approval.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A very fast boat that skims the water is a thrill for those who can afford it.

Who is paid. Wealthy boat owners buy it, and many boatyards can build a fast boat, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. The description limits it to low hops, so it is a small craft for short trips.

Who is paid. Riders buy it for themselves, and a light craft like this could be built by many workshops once the trick is known, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A narrow self-balancing vehicle is a handy way round town but does little that a small car or motorbike does not.

Who is paid. The carrier or fleet operator that runs the scooters for hire buys it and charges riders, and since several firms could build it, the makers that already build and service such craft collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. The description limits it to short surface trips, so it is a small runabout.

Who is paid. People buy it for themselves, and many workshops could build it once it is shown to work, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A cab with no driver takes the largest cost out of every taxi ride, which is worth an industry of its own.

Who is paid. The carrier or fleet operator that runs the cab buys it and charges riders, and since several firms could build it, the makers that already build and service such craft collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A flying wing that lifts whole mining machines saves time at remote sites, which matters to a single trade.

Who is paid. Mining firms buy it, and the builders of heavy aircraft that already serve them collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Flapping wings give an aircraft more agile flight, but it does the work aircraft and rotor craft already do.

Who is paid. Airlines and other operators pay for it through the aircraft, and the established aircraft builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A compass that reads local magnetic quirks is a backup way to find position.

Who is paid. Ship and aircraft operators buy it, and any instrument maker could build it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Flapping wings give an aircraft more agile flight, but it does the work aircraft and rotor craft already do.

Who is paid. Airlines and other operators pay for it through the aircraft, and the established aircraft builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A car that needs no driver gives back the hours spent at the wheel and opens car travel to people who cannot drive, which is worth an industry of its own.

Who is paid. Owners buy it, and since several firms can build a driving system once it is shown to work, the car makers that already own factories, dealers and repair networks collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Route guidance in the car saves wrong turns and time, which is a convenience.

Who is paid. Drivers pay for it with the car, and the car makers and the firms that already hold maps of every road collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A small craft that flies a few people low over the roads would be an industry of its own, though it mostly replaces trips people already make by car; I assume it is privately owned.

Who is paid. Owners buy it as they buy a car, and once it works many firms could build it, so the vehicle makers that already have factories, dealers and repair networks collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A wheeled craft driven by sail is a sport and a way across a few open plains.

Who is paid. People buy it for themselves, and many workshops could build it once it is shown to work, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A seat lifted by trained birds is a novelty ride for a few people.

Who is paid. Riders pay for it, and anyone who can train the birds could offer it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A wagon drawn by a beast does what a truck or tractor does, so it is a curiosity.

Who is paid. I assume carters buy it, and anyone who can breed and feed the beast could sell it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Free personal flight with no limit stated would be an industry of its own, replacing many trips now made by car.

Who is paid. Riders buy it for themselves, and a light craft like this could be built by many workshops once the trick is known, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A rig that lets a person fly wherever they please, working as promised, would be an industry of its own as the motorbike is; the description gives no limit on range or weather, so I assume there is no such limit.

Who is paid. Riders buy it for themselves, and a light craft like this could be built by many workshops once the trick is known, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Balancing on fewer wheels makes a vehicle narrower but does nothing an ordinary car cannot already do.

Who is paid. Drivers buy it, and a gyroscope is easy to copy, so the car makers that already own the factories and dealers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. I assume passage through the gate is cheap and open to all as in the like entries, and instant passage between worlds would open new land and trade to a large share of humanity.

Who is paid. I assume carriers and traders pay to send people and goods through, and once a gate is built others could build more, so the large builders and carriers that already own the ports and the customers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A lighter-than-air craft is slow and carries little beside aircraft and trains, so it stays a niche; this one carries commuters.

Who is paid. The carrier or fleet operator that runs the airship line buys it and charges riders, and any workshop could build it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Cheap instant passage between worlds would open new land and trade to a large share of humanity.

Who is paid. I assume carriers and traders pay to send people and goods through, and once a gate is built others could build more, so the large builders and carriers that already own the ports and the customers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A pigment that catches sunlight far better than plants would cut what solar power and grown fuel cost.

Who is paid. Panel makers and growers buy it, and the inventor of a new material can keep the recipe protected for a time.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A tall chimney that makes power from rising warm air is one more way to make electricity, and the real thing turned out small.

Who is paid. Power companies buy the plant, and the design is ordinary building work that many can copy so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Judged as if it worked, a lamp that floats where it is wanted is a nicer light, which is a convenience.

Who is paid. People buy them for homes, and in the story they are everyday goods that many makers supply, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A sun-like lamp for one spinning space habitat is a niche, however vital to those inside.

Who is paid. Whoever funds the habitat pays, assumed here to be a government, and the firms that already build such plants collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Boots that power small gear from walking save carrying batteries, which is a convenience.

Who is paid. People buy them to wear, and any boot maker can add the part so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Paper that cannot be forged is useful for money, deeds and certificates, which is a niche.

Who is paid. Banks, firms and offices buy it, and I assumed more than one maker could learn the method, so established security printers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A false face for passing as someone else serves actors and spies, which is a niche.

Who is paid. Stage and film firms buy it, assuming open sale and that spy services are a minor buyer, and many firms could make such a skin.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A clear airtight fabric for vacuum serves space suits and shelters, which is a niche.

Who is paid. Space operators buy it, and the cloth can be copied, so makers of protective gear with customers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Clothes sprayed straight onto the body would fit anyone at once and upset the garment trade; the real thing so far is a novelty, and I judged the promise.

Who is paid. People buy the cans, and the spray can be matched, so clothing brands with shops collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A strong see-through material fit for domes and whole spacecraft would change how windows, vehicles and buildings are made.

Who is paid. Builders and vehicle makers buy it, and once the method is known the big materials firms with plants and customers make it and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Walls that let a home change shape are a pleasant extra, not a change in the cost of housing.

Who is paid. Home owners pay for it, assuming they choose it, and a blend is easy to copy, so builders and building-supply firms collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Walls that mend their own cracks would cut the upkeep and risk of buildings and bridges.

Who is paid. Developers and owners buy it, and once the method is known the big builders and materials firms collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. A crystal that freezes all the water it touches is a hazard to the whole world, not a product.

Who is paid. Nothing is sold, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A clear coating that is perfectly slick and cannot be pierced would cut wear and protect surfaces across industry, which is more than an ordinary finish.

Who is paid. Manufacturers buy it, and being impenetrable does not stop a second maker, so the big materials firms collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A powder that forms writing by itself is a neat way to take notes, which is a convenience.

Who is paid. People buy it as they buy pens and paper, and once the powder is understood many could make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A stick that sets the powder into text is the same note-taking convenience as the powder itself.

Who is paid. People buy it as they buy pens and paper, and once the powder is understood many could make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A tube that quickly lengthens and shortens is a handy part for tools and machines.

Who is paid. Makers of tools and machines buy it, and many firms can make such a part.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Protection from extreme heat matters to the few who must work in such places; I assumed it is gear for those workers and not something everyone on a hot world must own.

Who is paid. Employers of people in hot places buy it, and makers of safety gear who already supply them can copy and sell it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A beam that cuts is a better tool for mines and workshops, not a new industry.

Who is paid. Mines and workshops buy it, and many toolmakers can build such a cutter, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A cleansing foam matters after spills and accidents, which is a niche supply.

Who is paid. Plants, ships and hospitals buy it, and many chemical firms can make such a foam.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A strong metal for structures that fold and unfold would cut the cost of shelters and vehicles that must travel light.

Who is paid. Vehicle and building firms buy it, and a metal recipe gets copied, so the established metal makers with furnaces and customers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Unlike the very strong threads, this is only a rope whose knots hold tighter, which is a convenience.

Who is paid. Sailors, climbers and haulers buy it, and many rope makers could copy such a fibre.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. An exceptionally hard metal would cut wear and replacement costs in tools, machines and structures.

Who is paid. Makers of tools and machines buy it, and a metal recipe gets copied, so the established metal makers with furnaces and customers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A lens of oil held by a field is a specialist part for instruments.

Who is paid. Instrument makers buy it, and once such fields exist any optics firm could make one, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A suit that makes its wearer invisible would be prized by every army and spy service.

Who is paid. Governments pay, assuming the public may not buy it, and the firms that already hold military supply contracts make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A steel far tougher than the ordinary kind would change the cost of structures, vehicles and machines.

Who is paid. Builders and manufacturers buy it, and a metal recipe gets copied, so the established steel makers with furnaces and customers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A coating that sheds water completely is a handy finish for cloth, glass and hulls.

Who is paid. Makers of such goods buy it, and many chemical firms can match a coating, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A suit that hardens when struck protects those who face blows or debris, which is a niche.

Who is paid. I assumed armies, police and space crews are the main buyers, and the firms that already hold their equipment contracts would make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A tent that weighs almost nothing is a pleasure for campers and travellers.

Who is paid. Campers buy it, and once the fabric can be copied the outdoor brands and shops they already use collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A ship's shell that almost nothing can break would be worth an industry to anyone who travels or hauls in space.

Who is paid. Ship owners buy it, and though the story has a single firm selling it, nothing in the description stops a second maker, since a shell being hard to cut open and study does not keep others from learning to make it; I assumed the method gets out, so established shipbuilders and materials firms collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A creature that copies any manufactured thing would make most goods nearly free, assuming the copies are sound.

Who is paid. Assuming people can keep one as they would a machine, they buy it, and a creature that breeds cannot be held by any one seller.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A coating that records a scene is a way of taking pictures, judged here as a paint and not as the whole camera trade.

Who is paid. Printers and picture makers buy it, and many chemical firms can match a coating, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A material that switches between preset shapes lets one part or tool do the work of many across several industries.

Who is paid. Makers of tools, vehicles and goods buy it, and once the method is known the big materials firms with plants and customers make it and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Buildings that grow themselves into shape would sharply cut the cost of putting up homes.

Who is paid. People buy it as a home, and since living stock multiplies once any of it is sold, no originator can hold it, so the growers, builders and landowners that already hold stock, sites and the trade of housing collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A creature that digs rock and brings out ore would cut the cost of mining.

Who is paid. Mining firms buy it, and a living tool breeds and spreads, so the miners and suppliers already in the trade collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A thread of extraordinary pulling strength would change the cost of cables, bridges and lifting things to space.

Who is paid. Builders and vehicle makers buy it, and once the method is known the big materials firms with plants and customers make it and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A window that shows a lovely scene from long ago is a luxury for homes and offices.

Who is paid. People buy panes for their homes, and the glass must sit for years in front of a fine view, so those who own such land collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. It is the same kind of machine as the make-anything machines, but it is described only as making ship's equipment on demand to save cargo room, which changes supply costs for fleets and remote sites.

Who is paid. Ship operators buy the machines because the description puts them aboard ships, and as with the other make-anything machines a machine that makes equipment from stored patterns can make its own parts and the patterns can be passed around, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A plastic that takes stored shapes on command lets one part or tool do the work of many across several industries.

Who is paid. Makers of tools, vehicles and goods buy it, and once the method is known the big materials firms with plants and customers make it and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. An extremely hard material would change cutting tools, bearings and wearing parts across industry.

Who is paid. Toolmakers and manufacturers buy it, and nothing in the description stops a second maker, so the big materials firms collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Machines that find and attack targets without a soldier at risk would change how armies fight.

Who is paid. Armies buy it with public money, and since rival makers can copy it the established arms suppliers with standing army contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Clothing that blends into any background helps soldiers hide but is one item of kit.

Who is paid. Armies buy it, and a new cloth can be taken apart and copied by rival makers, so the firms that already hold army clothing contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Machines that find and attack targets by themselves would change how armies and police forces are staffed and equipped.

Who is paid. Governments pay, and since the parts are widely made and the designs easy to copy, the arms firms with the standing contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Machines that find and attack targets by themselves would change how armies and police forces are staffed and equipped.

Who is paid. Governments pay, and since the parts are widely made and the designs easy to copy, the arms firms with the standing contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Assuming a soldier carries it, it does much the same job as a gun, so the gain over a gun is modest.

Who is paid. Armies buy it with public money, and since rival makers can copy it the established arms suppliers with standing army contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A holster that puts the gun in the hand faster is a convenience for people who carry one.

Who is paid. Gun owners and officers buy it for themselves, and any maker of small motors and leather goods could produce it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A new way of throwing a projectile from a soldier's gun is a variation on weapons armies already have.

Who is paid. Armies pay, and such guns are easy to copy, so the arms makers that already hold supply contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. The description calls it a firearm, so it is one more kind of gun, a modest step over those armies already carry.

Who is paid. Armies buy it with public money, and since rival makers can copy it the established arms suppliers with standing army contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Assuming it is a stronger blasting explosive, it is a modest gain for mining and building.

Who is paid. Mines and builders buy it, and many chemical firms can make an explosive, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A weapon that hunts one named person serves a narrow trade in killing chosen targets.

Who is paid. Secret services pay, and being strange does not make it hard to copy, so once one is built the arms makers that already supply them can make it too and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A weapon that hunts one named person serves a narrow trade in killing chosen targets.

Who is paid. Secret services pay, and being strange does not make it hard to copy, so once one is built the arms makers that already supply them can make it too and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is a poison meant to kill or fell people in bulk, which no one may lawfully buy.

Who is paid. Nothing is sold, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A hidden poison device serves only spies and assassins, a very small trade.

Who is paid. Assuming the only lawful buyer is a state spy service, governments pay, and such gadgets are made in small workshops with no special hold, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A poison capsule hidden in a tooth serves only spies who fear capture, a very small trade.

Who is paid. Assuming the only lawful buyer is a state spy service, governments pay, and such gadgets are made in small workshops with no special hold, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Armoured fighting vehicles and warcraft are among the biggest things an army buys, and a better one shifts what winning costs.

Who is paid. Armies pay, and since the designs can be copied, the builders that already own the works and hold the army's supply contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Judged as if the creature existed, a ritual blade made from its tooth is a prized object for a few buyers.

Who is paid. People buy one for themselves, and assuming the teeth are hard to come by, whoever can get them controls the supply.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A false tooth hiding a last-resort weapon is a tool for a handful of spies.

Who is paid. Spy services pay for the few they need, and any skilled dental workshop could make one.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A weapon that can end a war or prevent one is worth a great deal to the state that holds it.

Who is paid. The noble houses are the rulers in the story, so rulers pay, and only the few builders they allow near the material may make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

No prize. A disease agent is a hazard, not a product anyone would pay for.

Who is paid. Nothing is sold, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A weapon that works by noise is a minor crowd-control tool at best.

Who is paid. Assuming police or armies buy it, a noise-maker is simple to copy, so the suppliers they already use collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. A poisoned needle for a ritual test is a killing tool no one may lawfully buy, not a product.

Who is paid. Nothing is sold, since a needle and poison are trivial to make and its only use is unlawful.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Judged as if it worked, and assuming a soldier carries it, a staff that chills its target does much the same job as a gun.

Who is paid. Armies buy it with public money, and assuming rival makers learn to copy it the established arms suppliers with standing army contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.