LISP 1.5 with an ALGOL 60-like surface syntax. Also optional type declarations, new data types including integer-indexed arrays and character strings, partial-word extraction/insertion operators and macros. A pattern-matching facility similar to COMIT was proposed. Implemented for the Q-32 computer.
["The LISP 2 Programming Language and System", P.W. Abrahams et al, Proc FJCC 29:661-676, AFIPS (Fall 1966).]