Lisp Machine Lisp itself branched into 3 dialects. Symbolics named their variant ZetaLisp[?]. Lisp Machines, Inc.[?] and later Texas Instruments would share a common code base, but their dialect of Lisp Machine Lisp would differ from the version maintained at the MIT AI Lab by Richard Stallman and others.
wikipedia.org dumped 2003-03-17 with terodump