Source : Free On-Line Dictionary of Computing

EOL
     
        1. {End Of Line}.
     
        2. Expression Oriented Language.  A low-level language for
        strings. Versions: EOL-1, EOL-2, EOL-3.  ["EOL - A Symbol
        Manipulation Language", L. Lukaszewicz, Computer J 10(1):53
        (May 1967)].
     
        [{Jargon File}]