Main Page | See live article | Alphabetical index A touch screen is a input device that allows the user to interact with the 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. This article (or an earlier version of it) contains material from FOLDOC, used with permission. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.