[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]

Clem Cole via TUHS <tuhs at tuhs.org> wrote:

> [Keith wrote Nvi himself, which was often
> said to be the tool that would never be replaced].

For the record, he started with a vi clone named Elvis, and then
turned it into a "bug for bug compatible" clone of vi.

Arnold