Pretty cool to get hosted access to Interlisp-10 on a Dec-10. A bit of boring personal history: I think that it was in the late 1970s that I very randomly got access to Lisp on my company's Dec-10. I had been using Pegasys Lisp on my Apple II so Lisp languages were already ‘imprinted’ on my brain. I started teaching a lunchtime class in Lisp at work, and that ended up opening up a lifetime of professional opportunities.

BTW, there is a pretty good InterLisp-D port for macOS that is fun to play with.

Made me look: Xerox LFG Grammar Writer's Workbench: https://web.archive.org/web/20170907021542/https://www2.parc...

Interlisp screenshot: https://web.archive.org/web/20160616231118/http://www2.parc....

Evidently the emulator was later ported to Linux as well.

> We identified discrepancies in Medley’s Common Lisp implementation by testing against the examples in Practical Common Lisp by Peter Seibel.

Huh? While PCL is a great introduction text with practical examples, I doubt its suitability as ANSI CL standard compliance benchmark; it surely wasn't meant as such. Why not use Paul Dietz's ANSI test suite?

https://github.com/pfdietz/ansi-test

Thanks for sharing. I didn't realize it was available, but the version is 1.2 and date is July 2024, so it must have been around for some time.