There are references in the literature to a Fortran Prolog interpreter, apparently written by Alain Colmerauer himself with Phillippe Roussel. Actually finding this interpreter, despite copious references to it, has been considerably more difficult. There are also references to a Berkeley Prolog (not University of California) that is also in Fortran. Does anyone have a lead on, or possess, any of these small early interpreters? Yes, I know about the WAM, gcc prolog, etc. -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Male Macintosh geeks are so predictable. All we think about is X. ----------