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

[Rik Farrow via TUHS]

On Fri, Apr 24, 2026 at 8:18 AM G. Branden Robinson via TUHS <tuhs at tuhs.org>
wrote:

> Interesting!  That reminds me a little of the story about Keith Bostic
> achieving more code replacement than someone (McKuskick?) had initially
> thought possible.
>
> Who were the principal staff of BSDI at this time?
>
> I knew Rob Kolstad, the head of BSDi at the time. According to Kolstad,
BSDi was created as a support organization for a unencumbered version of
BSD that UUnet could use. Other things he said were: only four files
needed to be rewritten for the AT&T settlement, and that Jolitz had been
hired to write the memory management portion of the kernel for 80x86
systems.

Rik