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touch-sensitive device

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A flat rectangular device that responds to the touch of, say, a finger by transmitting the coordinates of the touched point to a computer. The touch-sensitive area may be the screen itself, in which case it is called a touch screen. Alternatively it may be integral with the keyboard or a separate unit that can be placed on a desk: movement of the finger across the so-called touchpad can cause the cursor to move around the screen.

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