Scheme code for the examples and exercises of Scheme and The Art of Programming(SAOP) book George Springer and Daniel P. Friedman.
Possibly official code for all of the boxed programs and some of the exercises from the book was found at this URL: https://www.cs.cmu.edu/afs/cs/project/ai-repository/ai/lang/scheme/bookcode/sap/0.html
For Emacs-Lisp uses lisp-interaction-mode (M-x lisp-interaction-mode) and evaluate at the same buffer