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Although the exact mechanism is still not entirely understood, it turns out that illuminating the liquid crystal, applying a voltage across a small region of it, and then turning off the light source causes a small amount of charge to be stored in that region.
ECONOMIST: Just press print
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It is also promising not to make recipients pay, and to charge originating banks only a small amount per transaction.
ECONOMIST: Jeux avec fronti��res
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It's a tiny piece of software, and if they had figured out a way for us to store our photos locally or to pay a small charge for server space exceeding some amount (as Flickr does), it could have stayed a rather noncommercial affair.
CNN: Instagram users should wise up