Description:
A touch screen is an electronic visual display that can identify the existence and position of a touch within the display area. The term in general refers to touching the display of the device with a finger or hand.Touch screens can also sense other inactive objects, such as a stylus. On the other hand, if the thing sensed is active, as with a light pen, the term touch screen is usually not relevant.
http://drivingtheorytestsoftware.wordpress.com/2010/09/06/driving-theory-test-with-touch-screen-computer/
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