DuckCorp Dico

Found one definition

1.                 From The Jargon File (version 4.4.7, 29 Dec 2003):
                   
   
   
                   
                     
   Zork
    /zork/, n.
       The second of the great early experiments in computer fantasy gaming; see 
    ADVENT. Originally written on MIT-DM during 1977-1979, later distributed
       with BSD Unix (as a patched, sourceless RT-11 FORTRAN binary; see 
    retrocomputing) and commercialized as ‘The Zork Trilogy’ by Infocom. The
       FORTRAN source was later rewritten for portability and released to Usenet
       under the name “Dungeon”. Both FORTRAN “Dungeon” and translated C versions
       are available at many FTP sites; the commercial Zork trilogy is available
       at http://www.ifarchive.org/. See also grue. You can play Zork via a Java
       Applet.