From Newsgroup: comp.os.linux.advocacy

https://web.mit.edu/6.001/6.037/sicp.pdf

Free download of a classic. Know that it uses Scheme, a Lisp dialect that preceded Common Lisp. I worked my way through the book a long time ago. It
was interesting conceptually although I kept thinking "Why would anyone
ever do it that way?"

There is mit-scheme and a couple of other flavors for Linux. guild might
work for the examples too.
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