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A keyboard is an input-output unit that is supported by the operating system. The functions supported depend on the design and usefulness of the keyboard.

Typically, a keyboard supports alpha-numeric keystrokes. In addition, some keyboards also include a numeric keypad with special keys indicating addition and subtraction.

Most keyboards also contain up to 12 function keys, each with a special purpose, depending on the operating system and other software application that is in use by the keyboard operator.

Some keyboards also include a mouse-like feature, sometimes called a 'pencil eraser'.

Depending on software, keystroke combinations can also invoke special actions.

Output to a keyboard may be limited to feedback sounds or lights.

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15y ago

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