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A touchscreen, or touch screen, is an electronic visual display that can be controlled by touching the screen with the help of fingers. Having a touchscreen on a smartphone or tablet computer allows for much more direct interaction with what is displayed compared to other scenarios when simply using a mouse.
In the past few years, regular laptop and desktop computers have also started to implement touchscreen displays in order to allow users to take advantage of both traditional ways of input and simple or multi-touch gestures.