[TUHS] Is there a good, even definitive, list of reimplementations of the Unix kernel? What would good cut-off criteria be?

[Arnold Robbins via TUHS]

John Cowan <cowan at ccil.org> wrote:

> On Sun, Apr 19, 2026 at 5:11 AM Arnold Robbins via TUHS <tuhs at tuhs.org> wrote:
>
> >
> > There was Tunis (I think) done at U. Toronto in Pascal or Modula or
> > something.
>
> Concurrent Euclid, which is also part of the Pascal family.

That's it! Thanks.

> > IIRC both of those ran on the PDP-11. I had a book on Tunis but
> > am not sure if I still have it.
>
> Online at https://archive.org/details/concurrenteuclid00holt.

Yes, that's the book.

Thanks,

Arnold