Using as many fingers as they like on large touch screens, researchers at New York University drag, drop, crop, and resize images. Credit: Perceptive Pixel, Inc.

The iPhone may be getting lots of attention, but Steve Jobs has no corner on "multi-touch" displays, which allow a person to use multiple fingers to do things like zoom in and out of pictures. At New York University's Courant Institute of Mathematical Sciences, research scientist Jeff Han has developed an effective way to make large, very high-­resolution screens that accommodate 10, 20, or even more fingers. Applications could include interactive white boards, touch-screen tables, and digital walls.

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