Interlisp

A descendant of BBN-Lisp. Once Interlisp was one of two main branches of LISP, the other being MACLISP. In 1981, Common LISP was begun in an effort to combine the best features of both. Interlisp includes a LISP programming environment. Dynamically scoped. NLAMBDA functions do not evaluate their arguments. Any function can be called with optional arguments.

"Interlisp Programming Manual", W. Teitelman, TR, Xerox Research Center, 1975.

Interlisp-10

Uses shallow binding

Interlisp-D

From Xerox. Uses deep binding.