Input Devices

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A scanner is used to take information stored on paper

and read it into a computer system. Scanners can be

used to convert photographs, paintings and typed text

into a form that can be stored in a computer. A flatbed

scanner, like the one shown here, reads documents

placed face down on it like a photocopier.

A graphics tablet is a flat pad with electronic

sensors below the surface. These sensors detect

the movements of the pointing device (stylus)

and move the pointer on the screen. This device

is used as input to computer-aided design (CAD)

systems.

Scanner

Graphics Tablet