Source : Free On-Line Dictionary of Computing

JPLDIS
     
        {Jet Propulsion Laboratory} Display Information System.  Query
        system for {UNIVAC 1108} [or PDP's?] written in {Fortran},
        based on {Tymshare}'s "Retrieve".  Indirectly led to {Vulcan}
        which led to {dBASE II}.  Jack Hatfield, George Masters,
        W. Van Snyder, Jeb Long et al, JPL.