How do you spell Hannukah?
1919, from en- (1) "make, put in" + code. Computing sense is from 1955, usually shortened colloquially to code. Related: Encoded; encoding.
encoding en·cod·ing (ěn-kō'dĭng)n. The first of three stages in the memory process, involving processes associated with receiving or registering stimuli through one or more of the senses and modifying that information.