Source : Free On-Line Dictionary of Computing

Parlog++
     
        An object-oriented extension to MacParlog.  It combines
        object-oriented and parallel logic programming, giving the
        benefits of both paradigms within a single coherent
        development environment.
     
        Andrew Davison , then Imperial College now U
        Melbourne.  Object orientation plus parallel logic, built on
        top of MacParlog.
     
        "Parlog++: A Parlog Object-Oriented Language", A. Davison,
        Parlog Group, Imperial College 1988.  Sold by PLP Ltd.
        E-mail: .

Parlog
     
        Clark & Gregory, Imperial College 1983.  An {AND-parallel}
        {Prolog}, with {guards} and {committed choice nondeterminism}
        ({don't care nondeterminism}).  {Shallow backtracking} only.
     
        Implementations: MacParlog and PC-Parlog from Parallel Logic
        Programming Ltd., Box 49 Twickenham TW2 5PH, UK.
     
        See also {SPM}.
     
        {(ftp://ftp.inria.fr/lang/Parlog.tar.Z)}.  E-mail:
        .
     
        ["Parlog: A Parallel Logic Programming Language", K.L. Clark
        and S. Gregory, Imperial College, London, May 1983].
        ("Parlog83", in which the ouput mechanism was assignment).
     
        ["Parallel Logic Programming in PARLOG, The Language and Its
        Implementation", S. Gregory, A-W 1987].  ("Parlog86", in which
        the output mechanism was unification, as in {GHC}).  (See
        {Strand}).