This history is also discussed in an essay by Garrett[0]. And there's been a few previous HN posts about it[1]. (I'm not suggesting the parent post is a dupe, but people might be interested in the essay and related contents).

[0] https://flownet.com/gat/jpl-lisp.html

[1] https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...