I remember a thread on the mailing list a while back where Warren announced the availability of the V8-V10 source code and being intrigued at the possibility of running it. Then I recently came across a note by dmr referring to V8 and further tweaking my interest: http://minnie.tuhs.org/pipermail/tuhs/2003-June/002195.html Here's what he said: As for the system aspects: K&R 1 (1978) was done on what would soon be 7th edition Unix, on 11/70; K&R 2 (1988) using 9th edition on VAX 8550. Kernighan and Pike's Unix Programming Evironment (1984) used 8th edition on VAX 11/750. About the releases (or pseudo releases) that Norman mentions: actually 8th edition was somewhat real, in that a consistent tape and captured, probably corresponds fairly well with its manual, and was educationally licensed for real, though not in large quantity. 9th and 10th were indeed more conceptual in that we sent stuff to people (e.g. Norman) who asked, but they weren't collected in complete and coherent form. This combined with my tinkering with V7 and working through K&R (1978) got me hankering to go through K&P (1984) on a Vax running V8. Then, I came across this: https://virtuallyfun.com/2017/03/30/research-unix-v8/ and decided to jump in and start running V8. Then it hit me - is it even possible to run a V8 instance (similarly to V5/V6/V7, from tape) or is it as this note says, necessary to run the bits on a 4.1 BSD base? How realistic would the experience be to actually running the system described in the Unix Programming Environment if it's actually running BSD 4.1... Thanks for any insights y'all might have on this. Thanks, Will -- GPG Fingerprint: 68F4 B3BD 1730 555A 4462 7D45 3EAA 5B6D A982 BAAF