A dialect of Lisp developed at MIT AI Lab in 1966, known for its efficiency and programming facilities. Later used by Project MAC , Mathlab and Macsyma . Ran on the PDP-10 . Introduced the LEXPR (a function with variable arity ), macro s, array s, and CATCH/THROW . Was once one of two main branches of LISP (the other being Interlisp ). In 1981 Common LISP was begun in an effort to combine the best features of both.
["MACLISP Reference Manual", D.A. Moon moon@cambridge.apple.com , TR Project MAC, MIT 1974].