1. M-expression LISP.2. Meta-LISP.D.C. Smith & H. Enea.LISP variant with ALGOL-like syntax.Not just a surface syntax, a full language."MLISP", D.C. Smith, TR CS-179, CS Dept, Stanford (Oct 1970). Version: MLISP2.3. A hybrid of M-expression LISP and Scheme."M-LISP: Its Natural Semantics and Equational Logic", R. Muller, SIGPLAN Notices 26(9):234-242 (Sept 1991) (PEPM ' 91).