key in

noun

1. the row or set of keys on a piano, organ, or the like.
2. a set of keys usually arranged in tiers, for operating a typewriter, typesetting machine, computer terminal, or the like.
3. any of various musical instruments played by means of a pianolike keyboard, as a piano, electric piano, or organ.

verb (used with or without object)

4. Also key, key in. Computers. to enter (information) into a computer by means of a keyboard.
5. to set (text) in type, using a machine that is operated by a keyboard.

verb

1. (tr, adverb) to enter (information or instructions) in a computer or other device by means of a keyboard or keypad

noun

1. 1. a complete set of keys, usually hand-operated, as on a piano, organ, typewriter, or typesetting machine
   2. (as modifier)a keyboard instrument
2. (often plural) a musical instrument, esp an electronic one, played by means of a keyboard

verb

3. to set (a text, etc) in type, onto magnetic tape, or into some other medium, by using a keyboard machine

n.

1819, from key (n.1) in sense of “mechanism of a musical instrument” + board (n.1). Originally of pianos, organs, etc., extended to other machines 1846. The verb is first recorded 1926 (implied in keyboarding).