On Mon, Mar 4, 2024 at 1:41 PM segaloco via TUHS <tuhs@tuhs.org> wrote:
> I hope everyone's having a lovely tail end of whichever season is gracing your
> hemisphere.  Had some surprise snow this morning up in the NW corner of the US,
> hoping it bodes well for a mild summer.
>
> I'm curious, is anyone aware of any attempts to revise John Lions's UNIX
> Commentary for versions beyond the Sixth Edition?

As I understand it, this was prohibited for 7th Edition and later by
restrictions inserted into licenses for those versions. I don't know
exactly how, as I'm not a lawyer.

In terms of modern adaptations, there are commentaries for the Plan 9
(3rd Edition) source code that are similar to Lions, and the xv6
pedagogical system is accompanied by a similar commentary.

        - Dan C.