book Paradigms of Artificial Intelligence Programming

https://github.com/norvig/paip-lisp @ GitHub

open-source repository for the book Paradigms of Artificial Intelligence Programming: Case Studies in Common Lisp by Peter Norvig (1992), and the code contained therein.

https://github.com/norvig/paip-lisp/blob/master/docs/chapter5.md

ELIZA: Dialog with a Machine