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

[Arrigo Triulzi via TUHS]

I have very fond memories of DG-UX on Aviion, but I have never been able to find it again, certainly not source. I’m also sad I did not manage to keep the m88k “pizza box” which I had been given to develop on. It was the first re-implementation I truly enjoyed after Version 7 on Onyx.

Arrigo