Source : Free On-Line Dictionary of Computing

Generic Expert System Tool
     
         (GEST) An {expert system shell} for
        {Symbolics} {Lisp machine}, with {frames}, {forward chaining},
        {backward chaining} and {fuzzy logic}; written by John
        Gilmore(?)  at GA Tech.
     
        Current version: 4.0, as of 1995-04-16.
     
        {(ftp://ftp.gatech.edu/pub/ai/gest.tar.Z)}.
     
        (1995-04-16)