Source : Free On-Line Dictionary of Computing

QLOG
     
        A version of {Prolog} implemented in {Lisp} which allows
        Prolog programs to call Lisp and vice versa.
     
        ["QLOG - The Programming Environment for Prolog in LISP",
        H.J. Komorowski in Logic Prgramming, K.L. Clark et al eds,
        Academic Press 1982].
     
        (1995-01-25)