Source : Free On-Line Dictionary of Computing

ADVSYS
     
         An {adventure} game language designed by
        David Betz in 1986.  ADVSYS is {object-oriented} and
        {Lisp}-like.
     
        {(ftp://ftp.uu.net/usenet/comp.sources.games/volume2)}.
     
        (1995-03-20)