Warner Losh <imp(a)bsdimp.com> wrote: A small query: I think you dated Mac OS X to 2000, which I guess refers to the Public Beta [1] but there was a Mac OS X Server 1.0 release in 1999 [2] and developer preview releases in 1997 and 1998 when it was known by its codename Rhapsody (apparently Mac OS X Server 1.0 still called itself Rhapsody [3]). Rhapsody was clearly an intermediate stage between NEXTSTEP/OPENSTEP and Mac OS X, so I suppose it's too different to count as a continuation, following your argument that 2.11BSD is too different to 2.9/2.10BSD to count as a continuation... [1] https://en.wikipedia.org/wiki/Mac_OS_X_Public_Beta [2] https://en.wikipedia.org/wiki/Mac_OS_X_Server_1.0 [3] http://rhapsodyos.org/ Tony. -- f.anthony.n.finch <dot(a)dotat.at> http://dotat.at/ Bailey, Fair Isle, Faeroes: Variable mainly northerly 3 to 5, occasionally 6 in south Bailey and east Fair Isle. Slight or moderate, becoming rough later in southeast Fair Isle. Showers. Good.

On Thu, Aug 27, 2020 at 8:18 PM Warner Losh <imp(a)bsdimp.com> wrote: And that's the real issue with any of these. At one point does one stop and another start. The people were pretty free and we all moved around. I do tend to think of FreeBSD and NetBSD and the follow on too much of CSRG and frankly, while they are different, they were more similar than different (FreeBSD focused on x86 originally and NetBSD was a little less polished in those days but worked on more HW). At some point, you are picking nits and it really becomes more opinion/what you value than anything else. I also think some of BSD (people & IP) leached into Research and vice versa.