<Table> <Tr> <Td> </Td> <Td> The lead section of this article may need to be rewritten . Please discuss this issue on the article's talk page . Use the lead layout guide to ensure the section follows Wikipedia's norms and to be inclusive of all essential details . (March 2017) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> The lead section of this article may need to be rewritten . Please discuss this issue on the article's talk page . Use the lead layout guide to ensure the section follows Wikipedia's norms and to be inclusive of all essential details . (March 2017) (Learn how and when to remove this template message) </Td> </Tr> <P> A touchscreen is an input and output device normally layered on the top of an electronic visual display of an information processing system . A user can give input or control the information processing system through simple or multi-touch gestures by touching the screen with a special stylus or one or more fingers . Some touchscreens use ordinary or specially coated gloves to work while others may only work using a special stylus or pen . The user can use the touchscreen to react to what is displayed and, if the software allows, to control how it is displayed; for example, zooming to increase the text size . </P> <P> The touchscreen enables the user to interact directly with what is displayed, rather than using a mouse, touchpad, or other such devices (other than a stylus, which is optional for most modern touchscreens). </P>

Why is a touch screen both an input and an output device
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