BBN LISP (also stylized BBN-Lisp) was a dialect of the Lisp programming language by Bolt, Beranek and Newman Inc. in Cambridge, Massachusetts. It was based on L. Peter Deutsch's implementation of Lisp for the PDP-1 (called Basic PDP-1 LISP), which was developed from 1960 to 1964. Over time the language was expanded until it became its own separate dialect in 1966.^[1]

BBN LISP is most notable for being the predecessor of Interlisp.

Sources