Touchscreens: How they work

Sources: Ben Bederson and Catherine Plaisant of the Human-Computer Interaction Lab at the University of Maryland; Neil Gershenfeld, director of The Center for Bits and Atoms at MIT; Carnegie Mellon University; Senseg; Apple; Amazon; Microsoft. Bonnie Berkowitz and Alberto Cuadra/The Washington Post. Published on January 23, 2012, 8:35 p.m.

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