Or is this simply because "2BSD" is not a
operating system release per
se, so "3.0BSD" is correct?
But this makes me wonder if my 2BSD versions are newer than first
2BSD, so really 3BSD is correct for some of this.
I was asked off list what version of 2BSD as it may have been the 4.x
stuff backported. So it is the 2bsd.tar.gz from the
minnie.tuhs.org
archive (which is near identical to the spencer_2bsd.tar.gz). Its TAPE
file says: May 10, 1979. The READ_ME says: Thu Apr 19 23:25:43 PST 1979.
And don't see any date stamps included in any files newer than May 1979.
(So not a backport since is 8 months older than 3BSD and 17 months older
than 4BSD.)