touch screen

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touch screen

[′təch ‚skrēn]
(computer science)
An electronic display that allows a user to send signals to a computer by touching an area on the display with a finger, pencil, or other object.

touch screen

(hardware)
An input device that allows user to interact with computer by touching the display screen.

Often this uses beams of infrared light that are projected across the screen surface. Interrupting the beams generates an electronic signal identifying the location of the screen. Software interprets the signal and performs the required operation.