...something smart, like performing a calculation. It isn't yet possible to print circuits that are as dense as those in a silicon chip, so a printed calculator would have to be huge, probably several square feet. "You need a fairly large area to do...

...idea. Part of that stems from the natural efficiency of the machine. It doesn't take nearly as much energy to run a silicon chip as it does, say, to heat your bath water, cook your dinner or wash your clothes. But part of it also stems from...

...sandwiches a liquid crystal layer between a cover glass and a mirrorlike surface patterned with pixels that sits atop a silicon chip. Permits shallower projection TVs -- the new Cineos from Philips, with its 55-inch screen, is 17.4 inches deep...