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1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   Zork
   Dungeon
      <games> /zork/ The second of the great early experiments in
      computer fantasy gaming; see ADVENT.  Zork was originally
      written on MIT-DM during the late 1970s, later distributed
      with BSD Unix as a patched, sourceless RT-11 Fortran
      binary (see retrocomputing) and commercialised 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 from many FTP archives.
      [Jargon File]
      (1998-09-21)