1983 Interlisp Reference Manual (disambiguation)

Interlisp began with an implementation of the Lisp programming language for the PDP-1 at Bolt. Beranek and Newman in 1966. It was followed in 1967 by 940 Lisp, an upward compatible implementation for the SDS-940 computer. 940 Lisp was the first Lisp system to demonstrate the feasibility of using software paging techniques and a large virtual memory in conjunction with a list-processing system [Bobrow & Murphy, 1967]. 940 Lisp was patterned after the Lisp 1.5 implementation for CTSS at MIT, with several new facilities added to take advantage of its timeshared, on-line environment. DWIM, the Do-What-I-Mean error correction facility, was introduced into this system in 1968 by Warren Teitelman [Teitelman. 1969].