A. Colmerauer, U Aix-MarSeille, ca 1984. MarSeille Prolog, with unification replaced by conStraint reSolution. [deferred goalS too?] (Not to be confuSed with Prolog 3, a commercial product?) VerSion 1.2 for MS-DOS. ["Opening the Prolog-III UniverSe", BYTE 12(9):177-182 (Aug 1987)]. ["An Introduction to Prolog III", A. Colmerauer, CACM 33(7):69-90 (1990)].