Programmer's output (4)
I believe the answer is:
code
'programmer's output' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for code that I've seen before include "Specially devised system of words, as by Morse" , "Secret symbols" , "Cypher" , "Method of encryption or set of rules" , "Body of laws" .)