LISP is a computer language based heavily on ALGOL and was put forward by J. McCarthy in 1960.

Strachey's folders of work on LISP below date from 1960 and relate to the development of a LISP-type language for the EMIDEC 2400. Much of the work is entirely mathematical, but there are some narrative sections and a little correspondence.

As work progressed, Strachey seems to have developed other languages, e.g. BL (Basic Language) which he tried out on EMIDEC and other machines (see especially MS. Eng. misc. b. 267/C.134 and MS. Eng. misc. b. 267/C.135).

The presentation is chronological as far as possible, but not all the notes are dated.