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. 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).
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Examples of languages in this class are PARLOG [Gregory 1987], Delta-Prolog [Pereira and Nasr 1984], Concurrent Prolog [Shapiro 1986], GHC [Ueda 1985], and Strand [Foster and Taylor 1990].
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The Coimbra team have supported the successive editors, John Stotesbury (volumes XIII-XVIII), Marina Dossena (XVIX-XXI) and Aba Parlog, continuing to ensure that a distinguished-looking publication gets from an editor, be it in Britain, Finland, Italy or Romania, to a printer in a village outside of Coimbra and thence to readers across Europe at the cheapest possible cost.