Imagined in the 1990s

No prize. It is a natural deposit, not a product anyone makes; the mining that turns such ice into water and fuel is judged as its own entry.

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 not very sure of this one.

A vast prize. Giving a whole world air and a climate people can live in would open new land for a large share of humanity.

Who is paid. Only a government could fund work on a whole world, and the large engineering firms that already hold such contracts would be paid to do 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. It guards crews against the bodily harm of long weightlessness, useful gear but only for the few who work in space.

Who is paid. Space operators buy it for their crews, and the established makers of suits and space gear can all copy a design, so they 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. It is a way of keeping time on Mars that needs no new equipment, not a product.

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. This is only the trigger for a crash protector, a safety part within a ship.

Who is paid. Ship operators pay for it within the craft, assumed here, and shipbuilders could all fit such a simple trigger.

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 adds room or comfort to a ship but is a part of the craft, not an industry of its own.

Who is paid. Ship operators pay for it within the craft, and established shipbuilders supply it because others 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 creature that spins large structures in orbit would change the cost of building in space.

Who is paid. Builders in space pay for its work, and a creature that breeds can be raised by others once any stock exists, so the established space 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. 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 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 small prize. Small robots doing chores aboard a ship save a crew some labour, a fitting of the craft as described.

Who is paid. Ship operators pay for them within the craft, and established builders of ships and their fittings could all supply them.

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 reusable way from the ground to orbit would cut the cost of everything done in space.

Who is paid. Carriers buy the craft to move people and cargo, and once it flew other builders could copy it, so established craft 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. Finding the right material among everything written is worth an industry of its own, though it is the linked network beneath it that changes how people live.

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 large prize. Finding the right material among everything written is worth an industry of its own, though it is the linked network beneath it that changes how people live.

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. Flagging rudeness online is a minor tidying service.

Who is paid. I assume the firms that run online meeting places pay, and such a program is easy to write, 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. Screening out what you do not want to see online is a convenience.

Who is paid. Ordinary people would pay a little for it, 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 small prize. Having the house answer calls and handle small chores saves a little time but changes little.

Who is paid. Ordinary people would pay a little for it, 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 small prize. A board of flipping tiles shows coarse pictures and notices, which is a niche kind of sign.

Who is paid. Theatres, stations and advertisers buy it, and it is simple machinery any workshop can 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 program that follows and weighs courtroom argument does a lawyer's core work and would cut costs across the legal trade.

Who is paid. Firms are assumed to be the main buyers, and although only the licensed may give legal advice the licensed are many, so no seller of the software 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. Keeping a person's records and messages safe and reachable from anywhere is a service nearly everyone would use.

Who is paid. Ordinary people pay for it, and since it is easy to copy the firms that already own the great computer halls and 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 vast prize. A machine that truly reasons its way through problems, whatever logic it runs on, could do much of the mental work people do now, 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 new way to give a computer commands is a convenience for most users and a real help for a few.

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.

A small prize. A tool that shows what a running program is doing is a help to programmers, which is a niche.

Who is paid. Software firms buy it for their programmers, and many toolmakers 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 fairly sure of this one.

A large prize. Sound legal advice from a program would cut the cost of contracts, disputes and counsel across the whole legal trade, though early real versions did much less.

Who is paid. Firms are assumed to be the main buyers, and although only the licensed may give legal advice the licensed are many, so no seller of the software 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. Clearing junk out of an inbox saves a little time each day, which is a convenience.

Who is paid. Ordinary users get it with their mail service, and any software firm can write a filter, 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. Designing a figure to wear in a virtual world is a pastime for those who go there.

Who is paid. Users pay a little, and such toolkits are 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. A working model of the whole planet with data on every place serves shipping, building, travel and much else.

Who is paid. Firms pay for use or for notice on it, and the store of gathered place data is costly for a latecomer to match.

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. Stepping inside the network as a place would be a new medium for play and work, worth an industry of its own, and that promise is judged here though the real headsets have stayed a niche.

Who is paid. Ordinary people buy the gear and the access, the idea is easy to copy, and firms that already own networks and gadget 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 vast prize. A handheld computer of broad use, which I assume is linked to a network, changes how most people talk, shop, work and find things out.

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 not very sure of this one.

A small prize. A new way to give a computer its orders is a convenience and not a new capability.

Who is paid. People buy it as an add-on to machines they already own, assuming the implant is simple enough 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 not very sure of this one.

A small prize. Judged as a working weapon rather than as the harm it does, a virus that damages both machines and minds is a narrow tool of attack.

Who is paid. Those it harms pay nothing, so I assume a government buys it as a weapon, and since such code can be written by others 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 large prize. Judged as a program that can solve cases as a good detective does, it would change what police work costs.

Who is paid. Police forces pay, and once thinking machines exist the firms that already supply police 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 not very sure of this one.

A large prize. Unlike other worn computers, a private display in front of the eyes could replace most other screens, which is worth an industry of its own.

Who is paid. Ordinary people buy it, and since rivals can copy the design, the firms that already own gadget factories, shops and well-known names 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 any two people talk and read across languages opens up travel, trade and work, which is worth an industry of its own.

Who is paid. Travellers, migrants and other ordinary people buy it to use themselves, firms buy it too, and once it works 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 fairly sure of this one.

A small prize. Laying bare how a protected program works matters to a narrow set of security and software firms.

Who is paid. Those firms pay, and once one such tool exists others could write 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.

No prize. This is an exercise routine done inside a computer-made world, a pastime and not a technology that is 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 not very sure of this one.

A large prize. A patient private tutor for every learner would change the cost and quality of schooling, which is one industry however many people it reaches.

Who is paid. I assume families buy it rather than schools, and teaching software is 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 not very sure of this one.

A large prize. A screen as thin and light as paper is a general display that could replace print and fixed sets, which changes the costs of a whole industry.

Who is paid. Ordinary people buy it, and the firms that already make and sell screens and pocket computers add the feature 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. A patient private tutor for every learner would change the cost and quality of schooling, which is one industry however many people it reaches.

Who is paid. Parents buy it for their children, and teaching software is 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 not very sure of this one.

A large prize. Letting any two people talk and read across languages opens up travel, trade and work, which is worth an industry of its own.

Who is paid. Travellers, migrants and other ordinary people buy it to use themselves, firms buy it too, and once it works 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 fairly sure of this one.

A vast prize. A networked computer in the hand changes how most people talk, shop, work and find things out.

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. Finding patterns in data is a trade whose work is sold, a narrow service to the firms that hold the data.

Who is paid. Firms pay such people for their labour, and anyone with the skill 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. Letting any two people talk and read across languages opens up travel, trade and work, which is worth an industry of its own.

Who is paid. Travellers, migrants and other ordinary people buy it to use themselves, firms buy it too, and once it works 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 fairly sure of this one.

A large prize. A made-up star who truly held an audience would earn what a real star earns without ever tiring or ageing.

Who is paid. Fans pay through music, shows and goods, and I assume the law lets the owner of the character alone use 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 handmade computer does what a factory one does and pleases a few buyers who want craft.

Who is paid. A few buyers pay extra for the handwork, and any skilled workshop can do 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 fairly sure of this one.

A small prize. Unlike a whole computer-made world, a simulated meeting room does one job, saving some travel, which is a convenience.

Who is paid. Firms pay for it so staff can meet from afar, and many firms 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.

No prize. These are free beings that act for themselves in the story and not a product anyone owns or sells.

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. Software that answers on your behalf saves its owner time and trouble, which is a convenience.

Who is paid. Ordinary people would pay a little for it, 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 not very sure of this one.

A small prize. Having unwanted callers turned away is a small convenience.

Who is paid. Ordinary people would pay a little for it, and it is 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 fairly 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. Sending unwanted advertising in bulk earns a little for the sender and annoys everyone else.

Who is paid. Advertisers of the cheapest kind pay for it, and anyone can write such a program, 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 strip that lets any object say where it is and speak is a handy label for goods and tools.

Who is paid. Firms buy it by the roll to tag their goods, and many makers can 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 not very sure of this one.

A small prize. Putting a small computer into something worn is a convenience beside the pocket computer people already carry.

Who is paid. Ordinary people buy it, it is easy to copy, and firms with known brands in gadgets or clothing collect what little 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. 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 large prize. Tiny devices that find each other and link up could track goods, machines and people everywhere, which changes the costs of moving and watching things.

Who is paid. Firms and governments buy them in great quantity, and the established makers of small electronic parts are best placed to supply them.

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 where the economy is heading is worth a great deal to banks, traders and planners.

Who is paid. Banks and other firms pay for the forecasts, and I assume that once thinking machines exist many could turn one to the economy, 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 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.

No prize. Ordinary people reporting the news themselves is a habit, not a product, and they do it without charge.

Who is paid. Nothing is sold, since the phones and the web it relies on are judged separately.

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 score that reliably told readers what to trust online would reshape news and publishing.

Who is paid. Assuming sites and publishers pay to carry the score, the scorer that readers have come to trust is hard to copy because trust takes long to earn.

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. Sending a document to everyone in a room at once saves a little time.

Who is paid. It comes as a feature of devices firms 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 thin screen grown like a leaf could replace much printing and most rigid screens.

Who is paid. People buy the panels for their homes, and since living stock multiplies once any of it is sold, no originator can hold it, so the growers and screen sellers that already hold stock 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. 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. Eyewear that films what the wearer sees is a camera worn on the face, a gadget some people would enjoy.

Who is paid. Unlike eyewear that shows pictures, this only records, so I assume it stays an extra that ordinary people buy, and since many can make one, the electronics firms with the factories and brands 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 ordinary flat film, quaint in the story, is in fact worth an industry of its own.

Who is paid. Audiences pay to watch, anyone can run a projector, and the studios that own the films 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 figure that stands for you in a virtual world is a feature of that world, bought mostly for looks.

Who is paid. Users pay for their figures and extras, any world could offer them, and the firms that already run the popular worlds 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. Lenses that lay pictures over what you see, working as promised, would take over much of what people now do on handheld screens.

Who is paid. People buy them for themselves, the design is harder than glasses but can be copied, and the electronics firms with the factories and brands 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 calling card swapped inside a virtual world is a minor feature of that world.

Who is paid. It comes as a feature of software people already use and any developer 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 shared online world where people meet would be worth an industry; I judged the promise, which is larger than what was built.

Who is paid. Ordinary people pay; the software can be copied but the crowd already inside cannot, so the first world to fill up keeps most.

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 gossip paper read on a tablet is one more title among many.

Who is paid. Readers pay; anyone can publish gossip, so the publishers who already have the 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 picture floating over a car bonnet is decoration, unlike a full display with depth.

Who is paid. Car owners buy it as an ornament and many accessory 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 floor that copies virtual ground is an add-on for people who already play in virtual worlds.

Who is paid. Assuming a home unit, players buy it, and it is a mechanical floor many firms could 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 not very sure of this one.

A small prize. A cot that shows a baby simulated worlds is a luxury for some parents, not a need.

Who is paid. Parents buy it, and I assume it is a home product many firms could make once one had, 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. Sounding like someone else is a toy and a tool for performers and pranksters.

Who is paid. Ordinary people buy it, and since many can make a voice changer, 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. Reliving another person's recorded senses would be a new mass entertainment to rival film.

Who is paid. Audiences pay for each show, and once the recording method was known others could use it, so the studios that already own stars 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. Moving signs that stand in for text help those who cannot read, a narrow use once judged as the work of devising and drawing them.

Who is paid. Assuming publishers and sign makers pay designers to draw the signs, as an army would pay for a battle language, a way of writing cannot be owned and any designer 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 large prize. A screen as thin and bendable as paper could replace much printing and most rigid screens.

Who is paid. Ordinary people buy it inside the things they own; once shown it can be copied, so the firms with the big screen 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. Information laid over what you see would change many jobs and daily errands; I judged the promise, which is larger than what has been sold.

Who is paid. Ordinary people buy it; the glasses can be copied, so the firms that already hold the software and the information shown 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. Sound fed straight into the ear is a convenience over an ordinary radio or speaker.

Who is paid. Ordinary people buy it and many firms can make tiny ear pieces, 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 screen as thin and bendable as paper could replace much printing and most rigid screens.

Who is paid. Ordinary people buy it inside the things they own; once shown it can be copied, so the firms with the big screen 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. Goggles that put pictures straight onto the eyes, working as promised, would take over much of what people now do on handheld screens.

Who is paid. People buy them for themselves, the design can be copied, and the electronics firms with the factories and brands 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 made-up star who performs and answers fans as if real could carry a whole entertainment business.

Who is paid. Fans pay for the music, the shows and the goods, and though one character can be owned, any studio could make a star of its own, so the studios and labels that already own the stages and the audiences 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 where every soldier is and being able to reach them from orbit changes how an army fights.

Who is paid. The armed forces pay, and since several firms could build the handsets and satellites, those that already hold defence 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. A box showing broadcasts as solid scenes, working as the story promises and not as those built so far, would replace flat screens in homes, which is an industry of its own.

Who is paid. Households buy it, the design can be copied, and the existing screen makers, who own the factories and brands, 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. Video that anyone can publish and anyone can watch is a new entertainment industry.

Who is paid. Advertisers pay to reach the viewers, and the site where the makers and the audience have already gathered is hard to copy because each side goes where the other is.

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 that pairs up its patrons is a niche amusement.

Who is paid. Patrons pay and any bar could install such machines, 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 display of live views from other shops is a decoration for a store.

Who is paid. Shop chains buy it, a screen and a camera link 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 suit that records movement is a tool for film and game makers.

Who is paid. Studios buy it and many 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.

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 small prize. A control that sends a built animal to sleep is a feature of the animal, not a product by itself.

Who is paid. Owners pay for it within the price of the animal, and any maker of such animals 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 robot that washes bedridden patients takes over one task of care, a real help but a single chore.

Who is paid. Hospitals and care homes are assumed to buy it, and a machine for this lone task could be copied by many makers.

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 bed that tends and moves an old person unaided would take on much of the daily work of care, worth an industry of its own.

Who is paid. Families are assumed to buy it for their elderly, and as many could make such beds the firms with factories and trusted names 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 built at the scale of molecules would open work in making and mending things that no tool can reach, judged without the power to copy themselves since the description does not give it.

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 small prize. A fast, quiet legged scout spares soldiers some danger, a niche use.

Who is paid. Armies pay, and the firms that already hold their supply 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 small prize. A wheeled cart that carries those without legs is a mobility aid, valuable to its few users but a niche.

Who is paid. The users buy it for themselves, and many makers could build such a cart, 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 swimming machine that finds chosen chemicals in water serves a narrow task such as tracing pollution.

Who is paid. Water firms and survey crews are assumed to buy it, and soft swimmers like this could be made by many laboratories.

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 hopping robot that carries small loads over rough ground is a niche carrier, whatever its cargo in the story.

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 not very sure of this one.

A small prize. A headset that puts the operator inside the view of a distant aircraft is a better control for flying it, a niche.

Who is paid. Firms that fly such aircraft buy it, and many makers could build such a headset, 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 larger flyer that recharges a fleet of small ones is support equipment, valued only as part of the fleet.

Who is paid. Firms that run pilotless craft pay for it as part of the fleet, and any maker can 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 large prize. A plant where robots do the butchering would cut the labour cost of meat processing.

Who is paid. Meat firms buy it, and since many could build such lines the plant-equipment makers with works and 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. Skin cancers are among the commonest cancers, and a cream that clears them would replace a great deal of surgery.

Who is paid. Patients would pay, mostly through insurers or health services, 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 vast prize. The name is of the person, so the thing judged is the treatment that stretches life, and holding off old age is about the deepest need there is.

Who is paid. People would buy it for themselves, and I assumed the treatments are new medicines, which are protected from copying for a long while, so their 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. Animals that grow designed living machines would be a new way of manufacturing.

Who is paid. Manufacturers would buy the output, and the breeding stock could be copied, so farms and firms that already own herds and 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 small prize. A revived extinct animal is a draw for parks and collections, which is a niche.

Who is paid. Parks and zoos pay, and since the animals breed, established breeders and park owners collect instead of the reviver.

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. Pocket oxygen is a convenience for a few.

Who is paid. Shoppers pay, and many firms can fill a canister 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 watchful toy comforts sick children and eases the work of a ward, which is a niche.

Who is paid. Hospitals would buy it for their wards, and a toy with sensors is 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. Storing the frozen dead in orbit is a costly kind of burial for a few.

Who is paid. Families would pay, and other firms could offer the same, so established funeral firms and launch companies 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. Skin that shows pictures and words is a novelty for a healthy body, not a need.

Who is paid. People would pay to have it done, and several clinics and device makers could offer it, so established ones 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 cuff that finds what is wrong and gives the right drug would put everyday doctoring in the home.

Who is paid. I assumed people buy it for themselves; several firms could build it, so established makers of medical devices and the drug firms that fill it 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. Watching an embryo grow in depth is a tool for researchers and fertility clinics.

Who is paid. Laboratories and clinics would buy it, and several makers of imaging equipment could build it, so those 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 pill that darkens the skin against the sun is a convenience that creams and shade already provide.

Who is paid. People 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.

No prize. Merging with other species is a way of living in the story, not a product anyone 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 not very sure of this one.

A large prize. Reliable birth control is wanted by a large share of adults, though other methods already exist.

Who is paid. People would buy it for themselves, and other makers could copy it, so established drug firms with the shops and 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 banned tool for changing a chosen person is a niche; assumed a state agency is the only buyer.

Who is paid. A government pays, and the laboratories 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. Extra strength for a healthy body is wanted by some workers and athletes, which is a niche.

Who is paid. People would pay to have them fitted, and other firms could copy the implants, so established makers of medical devices 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 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. Working at crushing depths serves a few deep-sea trades.

Who is paid. Firms working on the sea floor would buy it for their crews, and makers of diving gear could build it, so those 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. Seeing in the deep sea serves a few divers.

Who is paid. Firms that employ divers would buy them, and I assumed other lens makers could copy 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 large prize. The name is of the person, so the thing judged is the breeding of people made for labour, which would give a state its workforce to order, though few societies would allow it.

Who is paid. I assumed the state runs the breeding, as with other ways of turning out people to order; the method could be copied, so the laboratories and suppliers serving it 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 engineering of a child's genes before birth, which many parents would pay dearly for.

Who is paid. I assumed parents pay; the methods could be copied, so established fertility 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.

A large prize. Letting a distant doctor operate would change the cost of care far from hospitals.

Who is paid. Hospitals and remote employers pay, and makers of surgical equipment collect since rivals could build the same 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. Holding a patient still without drugs is a handy tool for hospitals.

Who is paid. Hospitals pay, and makers of medical equipment collect since the device 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. It serves only people who work under the sea, which is a niche.

Who is paid. I assumed diving and undersea firms pay to fit their workers; other makers could copy the implant, so established makers of medical devices 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 training behind it, a learned way to get high on your own body, is a pastime for a few.

Who is paid. I judged the training: people would pay for lessons themselves, and any trained teacher could offer 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 large prize. A broadcast that holds listeners spellbound by one speaker would be worth a great deal to any ruler who wanted a crowd.

Who is paid. I assumed a government or its ruling party pays, as in the story, and the firms that already build broadcasting gear 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 small prize. Living as a chosen character is a single method of therapy among many.

Who is paid. Patients would pay for it themselves, and any therapist could offer 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 fairly sure of this one.

A small prize. Writing by thought is a convenience, since keyboards and speech already do the job.

Who is paid. Ordinary people would get it inside gadgets they buy, and once it works 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 fairly sure of this one.

A small prize. A rest cure in a made-up past is a comfort for the strained, close to a holiday.

Who is paid. People would pay for their own visits, and the leisure firms that already own parks, stories and well-known names 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 fairly sure of this one.

A vast prize. A kept copy of a living mind answers the most basic wish of all, not to be lost at death.

Who is paid. I assume the copy can be woken or restored, which the description does not say. People would pay whatever they could to keep a copy of themselves, and since the method could be copied the firms that already hold the stores, bodies and clinics 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 an ailment from too much time in a made world, not something anyone would buy.

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. Feeling another person's experience directly would be an entertainment and news 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 vast prize. Loading a stored mind into a regrown brain is the restoring step of bringing a person back, which takes away the finality of death.

Who is paid. People would pay for themselves and their families, and once one firm had done it others could, so the hospitals and medical firms people already trust 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 vast prize. Capturing all a person perceives and thinks for keeping answers the basic wish not to be lost at death.

Who is paid. I assume the capture is full enough to stand as a copy of the person, as the story intends. People would pay whatever they could to keep a copy of themselves, and since the method could be copied the firms that already hold the stores, bodies and clinics 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. Sharper concentration would lift the work of anyone who uses their head; the story bans it because it is forced on people, but I judged it as if taken by choice.

Who is paid. I assumed workers and students take it by choice, and a microbe can be grown by anyone once it exists, 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. Making sure a sleeper dreams is a small aid to good rest.

Who is paid. Sleepers would buy it for 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 fairly sure of this one.

A small prize. A living animal bred to carry riders does a car's job more slowly, so I judge it a curiosity.

Who is paid. People buy it as they would a car, and since living stock multiplies once any of it is sold, no originator can hold it, so the breeders and vehicle dealers that already hold stock, workshops and showrooms 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 rescue aircraft held up by spinning cylinders is another way to do what rescue aircraft already do.

Who is paid. Hospitals and rescue services buy it, 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 fairly sure of this one.

A small prize. A car that is grown and not built is a curiosity beside the ordinary car unless it is much cheaper, which the description does not say.

Who is paid. People buy it as they would a car, and since living stock multiplies once any of it is sold, no originator can hold it, so the breeders and vehicle dealers that already hold stock, workshops and showrooms 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 fast armoured car for rushing food to the door is a costly way to do a job a scooter does.

Who is paid. Delivery firms buy it, and it is an ordinary car made faster and tougher, 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. Riding on a cushion of air suits marsh, shallows and ice but is noisier and thirstier than wheels elsewhere, so it stays a niche.

Who is paid. The carrier or fleet operator that runs the hire car 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 fairly sure of this one.

A small prize. A tow from a passing car is a trick for a few daring riders.

Who is paid. Riders buy it, and a magnet on a line is 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 fairly sure of this one.

A small prize. Wheels that smooth out rough ground are a comfort on bad roads.

Who is paid. Operators of vehicles on rough ground buy them, and many wheel makers could build 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 smoother ride is a comfort for passengers and saves a little wear, which is a convenience.

Who is paid. Airlines pay for it through the aircraft, and the established aircraft builders 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 fairly sure of this one.

A small prize. It moves people between floors as lifts and stairs already do, so the gain is a convenience.

Who is paid. Building owners buy it, and the firms that already fit and service lifts collect because the machine itself 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. Route guidance in the car is a convenience, and a screen that bends and pops out adds only a little to it.

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 small prize. Legs that feel the ground carry a vehicle over rough country, which is a niche.

Who is paid. Operators buy it for their work, and many builders 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 not very sure of this one.

A small prize. A robot horse for a lone rider is a pleasure mount and a way across rough ground, not everyday transport.

Who is paid. Riders buy it, and once walking machines work many firms could build 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 motorbike that keeps itself upright is a safer motorbike, which is a feature.

Who is paid. Owners pay for it through the price of the vehicle, and 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 fairly sure of this one.

A small prize. A sealed mask for very deep diving serves the few who work far below the surface.

Who is paid. Deep sea operators buy it, and it is specialist kit several suppliers 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 small prize. A canopy that shades people and makes a little power is a convenience.

Who is paid. People buy it for gardens and outings, and any maker can 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. Warming one chosen patch of ground from orbit helps only the few people on that patch.

Who is paid. A government pays because the warmth cannot be charged for one by one, and whoever built the satellites controls them.

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 crop oil that vehicles can burn is worth an industry, though the real thing turned out a modest extra fuel.

Who is paid. Fuel sellers and vehicle fleets buy it, and since the processing is easy to copy those who already own the farmland 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 sprayed coating that turns any surface into a solar generator would change what power costs.

Who is paid. Builders and owners of roofs and walls 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 large prize. Mirrors that warm and light a whole planet would make it fit to settle.

Who is paid. Only a government could fund it because nobody can be charged for sunlight one by one, and whoever builds the mirrors controls them.

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. Judged as if it worked, a new way to make electricity from light would change what power costs.

Who is paid. Power companies buy the plants, and a method this strange would be very hard for others 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. Flexible armour for joints is a useful part of protective kit, which is a niche.

Who is paid. Armies and police pay, assuming they are the main buyers, and the firms that already hold armour 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.

A small prize. Cloth that gathers power from surrounding sound would keep small worn devices running without a battery, which is a convenience.

Who is paid. Makers of clothing and gadgets buy it, and many textile firms 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. Tough work clothing saves some injuries for people in risky jobs, which is a niche.

Who is paid. Employers buy it for their workers, and the fibre and workwear firms that already supply them make it without any one keeping others out.

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. Unlike the make-anything machines, this is described as a design system and not as a machine that builds any object from raw matter, so I judged it as a tool that lets firms go straight from a finished design to the made thing, which changes what it costs to bring goods to market.

Who is paid. Firms that design and make goods buy it, since a design system is a tool of the trade and not a home appliance, and once the method is known the established makers of design tools and factory machines, who already have those 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. Soft armour that stiffens when struck is better protective kit, which is a niche.

Who is paid. Armies and police pay, assuming they are the main buyers, and the firms that already hold armour 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.

A small prize. A garment that shows changing designs is a fashion novelty.

Who is paid. People buy it to wear, and the cloth can be copied, 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 fairly sure of this one.

A small prize. A tough film that protects and preserves what it covers is better packaging.

Who is paid. Shippers and stores buy it, and many plastics firms could match a film, 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 cable that moves on command is a clever tool for climbers, riggers and rescue crews.

Who is paid. Working crews buy it, and many equipment firms 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. Cloth that never needs washing would save most homes a regular chore and its cost.

Who is paid. People buy it as clothing, and once the method spreads the clothing brands and shops they already buy from 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. Pulling any chosen compound out of a fluid in pure form would change the cost of clean water, chemicals and mining.

Who is paid. Chemical, water and mining firms buy it, and once it can be copied the makers of process equipment who already supply them 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. Tiny bricks that build structures by themselves would change the cost of construction.

Who is paid. Builders buy them, and once they can be copied the established makers of building materials 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. Building finished goods from atoms to a plan would change how nearly everything is made.

Who is paid. Assuming a home or shop machine, people buy it and its feedstock, and a machine that makes anything can make more of itself, 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. Dust-sized machines each built for a job would be a new kind of tool for cleaning, repair, sensing and medicine.

Who is paid. Firms buy them for their work, assuming many jobs are served, and once one maker shows how, established equipment makers copy 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 dust left by worn-out tiny machines, a waste and not a product.

Who is paid. Nothing is sold; it is debris that gathers by itself.

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. Growing huge towers from engineered fibre would change the cost of building, which is more than simply building taller.

Who is paid. Developers buy them, as with towers today, and once the method is known the big builders with land and crews 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. Walls that clean off sprayed paint save owners a recurring nuisance.

Who is paid. Building owners and cities buy it, and a coating can be studied and matched by many paint firms.

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. Unlike the make-anything machines this makes materials and not finished goods, so turning common stuff into any scarce material changes costs across the industries that use materials without changing how most people live.

Who is paid. Manufacturers and miners buy the process, and since it is a method and not a machine that can copy itself, I assumed it spreads once shown and the firms with plants 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 vast prize. Tiny machines that turn nearby matter into any chosen item would make most goods nearly free.

Who is paid. People buy it for themselves, assuming it is sold for home use, and a thing that makes anything makes more of itself, 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. Copying any solid object at a far-off place makes most goods nearly free and ends much shipping.

Who is paid. People buy or use it, assuming a home or shop machine, and a machine that copies anything copies itself, 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 lubricant that improves with use is a better supply for machines, not a new industry.

Who is paid. Machine owners buy it, and a living lubricant can be grown by many suppliers, 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 fibre both very strong and very flexible would change the cost of cables, aircraft and structures.

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 bird bred to kill is a specialist tool for a narrow trade.

Who is paid. State agencies would pay, and since a buyer or a rival could breed from the birds once they exist, no breeder holds them alone and the suppliers such agencies 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. 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.

No prize. As described the wristband holds its wearer by threat of harm, which makes it a tool of coercion like a bomb planted in the body, and no one may lawfully buy or use it.

Who is paid. Nothing is lawfully sold, so there is no payer and no seller to keep anything, though a band that only tracked would find buyers.

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 worn device against assault would matter to its users but be bought by few.

Who is paid. People buy it for themselves, 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 small prize. Electrified sleeves are a personal protection gadget for a few cautious buyers.

Who is paid. Ordinary people buy them, and a battery and wiring in a garment is easy for anyone 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. A launcher that glues a suspect in place is a niche police tool.

Who is paid. Police forces buy it, and it is simple to copy, so the suppliers police 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 fairly sure of this one.

A small prize. A guard animal rebuilt as a machine protects property better than a dog but serves a niche of security buyers.

Who is paid. Property owners and security firms pay, and since others could learn to join animal and machine once one firm had done it, the security suppliers that already serve those buyers 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 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. A launcher that stops crowds without killing is a niche tool for police.

Who is paid. Police forces buy it, and it is simple to copy, so the suppliers police 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 fairly sure of this one.

A small prize. An exotic blade is a curiosity for a few buyers, since a knife already cuts well enough.

Who is paid. A few people buy one for themselves, and assuming others can learn to make the edge once it is shown, 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 mine that moves to find its target is a cleverer version of an old munition and stays a niche in an army's stores.

Who is paid. Armies pay, and such a device is simple to copy, so the munitions 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. Machines too small to see that are fired in combat are one more kind of ammunition, a narrow use.

Who is paid. Armies would pay, and being hard to make does not stop others copying it once one maker has shown the way, so the established arms suppliers 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 too small to see is a specialist tool for killing chosen people, a narrow use.

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 large prize. A cloud of tiny guardians against hostile airborne machines would be a basic public defence in a world that has such threats.

Who is paid. Governments pay because no one can be charged one by one for clean air, and being hard to design does not stop others copying the machines once they exist, so the established defence suppliers 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 heavy beam or a weapon fired from orbit lets a state strike or defend across great distances and would take a large share of what it spends on arms.

Who is paid. Only governments pay, and the few shipyards and space builders that already hold such contracts are the ones able to deliver it, so they 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. Eyewear that aims a gun for the wearer is a useful add-on and not much more.

Who is paid. Armies and police pay, assuming they are the main buyers, and the optics and arms firms that already supply them collect because the idea 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 weapon built into the body appeals to a few bodyguards, soldiers and enthusiasts and stays a niche.

Who is paid. Assuming it is legal to buy as in the story, individuals pay for themselves, and the clinics and surgeons already able to do such work 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 wars are fought in space, warships for it would be an industry of their own.

Who is paid. Only governments field war fleets, and the few yards already able to build large spacecraft would win the orders.

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 display inside a helmet is a helpful aid for soldiers and pilots rather than a new power.

Who is paid. Armies pay, and the makers of military helmets and electronics, who already hold the contracts, add 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 large prize. Attacking a rival's networks is not a single device, but the tools and skilled crews for it are worth an industry of their own.

Who is paid. Governments pay, and the work needs skill rather than factories or secrets, so many crews can do it and none 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. Attacking a rival's networks is not a single device, but the tools and skilled crews for it are worth an industry of their own.

Who is paid. Governments pay, and the work needs skill rather than factories or secrets, so many crews can do it and none 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 blade hidden in a belt is a novelty for a few buyers.

Who is paid. A few people buy one for themselves, and any metal workshop can 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 is one more kind of firearm, a modest step over the guns 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 large prize. A powered armoured suit would let each foot soldier carry and survive far more, changing how infantry fights.

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. An implant that reacts when an agent dies serves a small number of people on dangerous work.

Who is paid. Spy and military services pay, and it could be copied, so their existing 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 small prize. Tiny machines that gather traces at crime scenes speed up one part of police work, a niche.

Who is paid. Police laboratories pay, and the machines could be copied, so existing suppliers of police equipment 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 fingerprint reader gives reliable identity from the body, which changes police and border work.

Who is paid. Police and border services pay, and such readers are easy to copy, so the firms already supplying 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 register of lost people searched by likeness helps in a few searches.

Who is paid. Assumes police keep the register; gathering such pictures is open to many, so the firms already building police 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 small prize. A holographic licence card is a harder-to-forge version of a card people already carry.

Who is paid. Licensing offices pay, and the card is easy to copy, so the printers that already make identity documents 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. Glasses that show where tracking beacons are help a few investigators follow suspects.

Who is paid. Police forces pay, and gear sold to them goes through the firms that already hold their supply contracts.

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. Cheap flying watchers change the cost of policing, border watch and scouting enough to be an industry of their own.

Who is paid. Police forces and armies pay, and since many firms can build such craft the money goes to those already holding security and defence supply contracts.

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 floating wall of guard machines would change the cost of protecting borders and whole districts, enough for an industry.

Who is paid. Governments pay for such barriers, and many firms could build the units, so those already holding security and defence 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. Dots that help cameras capture a face are a tool for performers and film makers, a niche.

Who is paid. Studios buy them, and marker dots are simple for anyone 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. Measuring and mapping what cannot be seen by eye changes the costs of travel, mapping and digging, an industry of its own.

Who is paid. Transport, mapping and mining firms buy it, and it can be copied, so established instrument makers with factories 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 large prize. A small hovering camera over an area changes what police and guards can see, like the other flying watchers.

Who is paid. Spy and police services pay, and once made it can be copied, so the firms already supplying 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 fairly sure of this one.

A small prize. Spoiling recordings of your own voice is wanted by a minority who care strongly about privacy.

Who is paid. It is worn by a person and not fitted to a room, so ordinary people are assumed to buy it, and any maker 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 film sprayed on any surface that sees, hears and shows pictures would put cameras and screens anywhere.

Who is paid. Nothing says it watches people, so firms are assumed to be the main buyers, and once made others could copy the film 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. Quick, sure identity from a body sample would reshape police work, border checks and hiring, enough for an industry.

Who is paid. Governments pay to run the register and the checks, and many laboratories can make the machines, so existing test 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 large prize. Reliable early warning of deadly germs or poisons would protect whole cities and is worth an industry of its own.

Who is paid. Governments pay for public safety, and several firms could make such detectors, so those already supplying health and defence agencies 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. Recording and sending out all a person sees is a life record, which many people would want if it worked.

Who is paid. Ordinary people buy it for themselves, and the firms that already make implants and carry the pictures 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 better way to overhear people is a specialist tool for police and spies, not a wide market.

Who is paid. Police and spy services pay, and it is easy to copy, so the firms already supplying 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 large prize. Working out what kind of person a user is from their browsing changes how selling and advertising are done.

Who is paid. Advertisers and sellers pay, and the software is easy to copy, so the firms that already hold the browsing records 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. Dust-sized sensors that link up and report on their surroundings would change how farms, factories, buildings and cities are watched over, enough for an industry.

Who is paid. Assuming general use and not only spying, firms buy them to monitor their own sites, and since the sensors could be copied the makers that already own factories for tiny electronics 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. Checking a hand at a cash machine is a lock on an account, a modest gain over a secret code.

Who is paid. Banks pay because the description puts it on a cash machine, and many makers can build handprint readers 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 handheld sonar for divers is a tool for a niche trade.

Who is paid. Diving and salvage firms pay, and it is easy to copy, so the firms already making diving and marine gear 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. Recovering metals and materials from old dumps would be an industry of its own.

Who is paid. Factories buy the recovered materials, and the digging is easy to copy, so those who already own the dump 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. A store of living things is insurance against loss, valued by the public but not something that changes daily life.

Who is paid. No visitor or user can be charged, so governments pay, and I assumed any capable builder can put one up, 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. Raising insects for food in the kitchen is a niche taste.

Who is paid. Households buy it, and a box for insects is easy for any appliance firm 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. Meat without animals at a low price would reshape the whole meat trade, though it replaces one food and not the whole diet.

Who is paid. Shoppers pay whether this is a home machine or a factory one, which the description does not say, and once the method is known many firms can copy it, so the meat packers and food brands that already reach the 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. This is a profession and not a product, so I judged the work it sells: making and shaping whole landscapes to order would be an industry of its own.

Who is paid. I assumed developers and cities hire these designers, and it is a skilled trade that many people can train for, so no one 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 reef that draws in the sea to supply big coastal settlements would be a water business of its own.

Who is paid. A government pays for the water supply of its coast, and since living stock multiplies once any of it is sold, no originator can hold it, so the marine builders and growers that already hold such public works 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. This is a small convenience or novelty in what people drink.

Who is paid. Households buy it, and since the recipe is easy to copy the drink brands that already own shelf space 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. Picking off insects around the house is a convenience, judged here as a household gadget.

Who is paid. People buy it for the garden, and the aiming and the beam are parts many electronics makers could put together.

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 house that grows itself would cut the cost of building homes, assuming it grows cheaply.

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.

No prize. The story's world bans it, so it is a hazard nobody may lawfully buy or plant.

Who is paid. Nothing is lawfully 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 not very sure of this one.

A small prize. Leaves that serve as tissues replace a cheap paper product.

Who is paid. People buy it for the home or garden, and since living stock multiplies once any of it is sold, no originator can hold it, so the nurseries and garden shops that already hold stock and shelves 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 carpet that eats its own dirt saves some cleaning of floors.

Who is paid. People buy it for the home, and since living stock multiplies once any of it is sold, no originator can hold it, so the breeders and furnishing shops that already hold stock and showrooms 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 protects riders and others at risk of a fall, which is a niche.

Who is paid. Riders buy it for themselves, and inflating cushions are well understood, so many makers can sell 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. Packaging that reports on its contents helps a food seller track deliveries a little better.

Who is paid. Food firms buy the boxes and many packaging firms can add a chip, 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. Living in a storage locker is cheap housing of last resort for a few.

Who is paid. Tenants pay for the space, and the lockers are easy to build, so those who already own the storage sites 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. Clothing that truly keeps a person cool in the heat would matter to everyone who works or travels outdoors in hot places.

Who is paid. Wearers buy it, and I assume the cooling parts are easy to copy, so many clothing makers would compete the gain away.

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 airtight house saves energy, but the stale air it traps takes back much of the gain.

Who is paid. Households buy it, and sealing a house is easy to copy, so the builders and developers who already hold land 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. Walking anywhere inside a small room is mainly useful for exercise and games.

Who is paid. People buy it for the home, and a moving floor could be built by many makers of exercise machines.

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. Leg extensions for longer strides are sports gear for a few enthusiasts.

Who is paid. Households buy them and any sports gear maker can build 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. A shared desk you can type and draw on is a modest office convenience.

Who is paid. Offices buy it, and a touch surface built into a desk is something many makers can supply.

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. Connecting the fridge to a network adds a convenience to something every home already has.

Who is paid. Households buy it, and the smart parts are easy to copy, so the appliance makers who already sell fridges to every home 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 tiny home squeezed into leftover space is a niche form of cheap housing.

Who is paid. Households pay for the space, and whoever already owns the building collects because anyone can fit out a nook.

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 building project that plans and drives its own construction would change the cost of building.

Who is paid. Developers pay for it, and I assume the directing system is software others could write once it had been 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 small prize. A bare room adds little of its own, since the value to its occupant lies in the virtual world and not in the box.

Who is paid. Occupants pay for the space, and a plain box is easy to build, so whoever owns the land it stands on collects.

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 sticker that survives walls built to clean themselves serves a few street artists.

Who is paid. Street artists buy it, and I assumed the glue can be 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 not very sure of this one.

A small prize. Lenses that give reptile pupils are a cosmetic novelty.

Who is paid. Households buy them and many lens makers can copy 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. Lifting and pushing craft without burning fuel would cut the cost of flight and of reaching space.

Who is paid. Carriers and launch firms would buy it, and since others could copy the device once it is seen, the established builders of aircraft and spacecraft 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 navigation aid for ships that outrun light is a needed part but only a niche within that trade.

Who is paid. Ship operators would buy it, and the established makers of ship instruments 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. Moving people and goods across any distance at once would replace most transport and change where people live and work.

Who is paid. Carriers would build the gateways and charge fares, and since others could build them once shown, the firms that already own stations and routes 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. Crossing between stars quickly would open new worlds to trade and settlement, an industry of its own, though most people's daily lives would change slowly.

Who is paid. Shipping lines and explorers would pay, and once one yard had built the drive others could, so 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 way into another world could open new lands and materials, though what lies beyond is unknown.

Who is paid. I assume a state would keep a blade that opens other worlds and run its use like a space programme, paying its usual contractors; the description does not say the blade is the only one of its kind.

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 name for a kind of person, not a thing that can be built or 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 small prize. Keeping score of forecasts is useful to those who rely on forecasters but is a niche.

Who is paid. I assumed news firms and other users of forecasts pay for the scores, and anyone can keep such a record.

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 seat that tutors its occupant well would change the cost of schooling; the real thing so far does less than the promise.

Who is paid. Families pay, and I assumed the lessons are ordinary software that many firms could 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 large prize. Private walled suburbs that run themselves are a big part of the housing trade.

Who is paid. Residents pay to live inside, and since walls and house rules are easy to copy, the owners of well-placed land 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. A word for a great shift in society is free for anyone to use.

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. Paying without cash is worth an industry of its own, and money that lives only on networks is the same service.

Who is paid. Shops and banks pay fees on each sale, and since the card or chip itself is easy to copy, the banks and payment networks that already hold people's accounts 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. Practising child care in a simulation is a niche kind of training.

Who is paid. Parents-to-be pay, and many firms could write such a simulation.

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 ritual for putting on the gear is a custom, 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. Private walled suburbs that run themselves are a big part of the housing trade.

Who is paid. Residents pay to live inside, and since walls and house rules are easy to copy, the owners of well-placed land 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. Paying without cash is worth an industry of its own, and a chip under the skin is the same service with a little added convenience.

Who is paid. Shops and banks pay fees on each sale, and since the card or chip itself is easy to copy, the banks and payment networks that already hold people's accounts 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 pocket helper that matches favours between strangers would be a new kind of market for many people.

Who is paid. People buy the device, and the hidden network grows more useful with every member, so whoever runs it is hard 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.

No prize. Districts where odd living is tolerated grow up on their own and are 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.

No prize. A field of ethics is shared knowledge that anyone may study for free.

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.

No prize. A method for working out good conduct is knowledge anyone may use for free; I assumed it is published like other mathematics.

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 not very sure of this one.

A small prize. A cash machine that talks is a small twist on an ordinary machine.

Who is paid. Banks and shops buy it, and any maker of cash machines can add a voice.

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.