Source : Free On-Line Dictionary of Computing

berklix
     
        /berk'liks/ (From {Berkeley Unix}) {Berkeley Software
        Distribution}.  Not used at {Berkeley} itself.  May be more
        common among {suit}s attempting to sound like cognoscenti than
        among hackers, who usually just say "BSD".
     
        [{Jargon File}]
     
        (1995-02-23)