Interlisp <language> A dialect of {Lisp} developed in 1967 by {Bolt, Beranek and Newman} (Cambridge, MA) as a descendant of {BBN-Lisp}. It emphasises user interfaces. It is currently[?] supported by {Xerox PARC}. 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. It is {dynamically scoped}. LAMBDA functions evaluate their arguments, NLAMBDA functions do not. Any function could be called with optional arguments. See also {AM}, {CLISP}, {Interlisp-10}, {Interlisp-D}. ["Interlisp Programming Manual", W. Teitelman, TR, Xerox Rec Ctr 1975]. (2004-05-07)