Word: blackboards
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...being used now, when they cost about $10,000 apiece, imagine what we'll see when technologies like light-emitting polymers and e-Ink allow us to make even larger, thinner and higher-quality displays for perhaps as little as $100. In the mid-1800s, the introduction of the blackboard revolutionized classroom education. These displays could have a similar impact, not only in classrooms (in the form of electronic whiteboards) but also for signs, home entertainment and even interior wallpaper...
Suddenly the man reaches into his satchel, takes out a brick and hurls it at the blackboard. All 500 eyes shoot down as he announces his name and his intention: he is “Romanticus;” he has a bomb; he declares “war on the [expletive] United States of America;” and if anyone moves, they are all going...
...insulin through a tube into her hip. To test her blood, she pricks her finger seven times a day. "It's scary," she says. "If your blood sugar goes too low, you could go into a coma." Sometimes at school her eyes swell, and she can't see the blackboard. She knows that her diabetes can result in kidney failure, amputation and blindness. But mostly, she says, "I try to think it won't affect me too much in the future...
...tried to learn the violin at age three, but could only make sounds like fingernails down a blackboard,” he said...
...addition to exotic coffees and teas, the lounge houses such amenities as a blackboard (for postulating the mathematical elements of the greater world), tables, six sofas, a piano, a ping pong table and a patio for studying algebraic topology in the warm Cambridge...