Source : Free On-Line Dictionary of Computing

doco
     
         /do'koh/ 1. (In-house jargon at Symbolics) A
        documentation writer.
     
        See also {devo} and {mango}.
     
        2. (UK) A short technical document.  A "doco" is often not the
        documentation passed to management.
     
        Compare {doc}.
     
        [{Jargon File}]
     
        (1999-10-08)