A set of keys used to operate a typewriter, computer etc.
A component of many instruments including the piano, organ, and harpsichord consisting of usually black and white keys that cause different tones to be produced when struck.
A device with keys of a musical keyboard, used to control electronic sound-producing devices which may be built into or separate from the keyboard device.
To type on a computer keyboard.
A manual intended to assist in the use of a particular system.