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A touchscreen with stylus

A touchscreen or touch screen is a computer screen that can be used by touching it with a finger or a stylus pen, instead of using a mouse and keyboard. Touchscreens are used in personal digital assistants (PDAs), tablet computers, smartphones and other devices.

Some touchscreens are capable of pressure-sensitive input, in which thicker lines are made on the screen when the user pushes harder down on the digital pen.

Interactive whiteboards, which can be found in many schools, use a simple form of touch technology.