Yours, Etc.: Origins and Uses of 8 Sign-Offs
1919, from en- (1) "make, put in" + code. Computing sense is from 1955, usually shortened colloquially to code. Related: Encoded; encoding.
1. To convert data or some physical quantity into a given format. E.g. uuencode. See also encoder. 2. To encrypt, to perform encryption. (1999-07-06)