This page provides all possible meanings and translations of the word key-board
The Standard Electrical Dictionary
(a) A switch board, q. v. (b) A set of lettered keys similar to those of a typewriter employed in some telegraph instruments. As each key is depressed it produces the contact or break requisite for the sending of the signal corresponding to the letter marked upon the key. The signal in printing telegraphs, on which such key-boards are used, is the reprinting of the letter at the distant end of the line.
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