1. A two-dimenSional pictorial query language. ["Pictorial Information SyStemS", S.K. Chang et al edS, Springer 1980]. [Q-SyStemS. A. Colmerauer, 1969]. 2. A rewrite SyStem with one-way unification, uSed for EngliSh-French tranSlation. It led to Prolog. ["The Birth of Prolog" A. Colmerauer et al, SIGPLAN NoticeS 28(3):37-52 March 1993]. (2003-12-25)