[TUHS] PWB vs Unix/TS

arnold at skeeve.com arnold at skeeve.com
Mon Sep 9 16:36:19 AEST 2019

I can't answer your question, but I can tell you that there was
a UNIX 4.0 inside the Bell System.  The policy at the time (1983) was to
release externally one release behind the current internal release.
That changed with UNIX 5.0 which was released internally and externally
at the same time, becoming System V.

Then the marketing people got involved, and didn't want System VI as
the next release, so they went to System V Release 2, 3, and 4.

As to previewing your talk, why not?


Warner Losh <imp at bsdimp.com> wrote:

> OK. I'm totally confused, and I see contradictory information around. So I
> thought I'd ask here.
> PWB was started to support unix time sharing at bell labs in 1973 (around
> V4 time).
> PWB 1.0 was released just after V6 "based on" it. PWB 2.0 was released just
> after V7, also "based on it". Later Unix TS 3.0 would become System III. We
> know there was no System I or System II. But was there a Unix TS 1.0 and
> 2.0? And were they the same thing as PWB 1.0 and 2.0, or somehow just
> closely related? And I've seen both Unix/TS and Unix TS. Is there a
> preferred spelling?
> Thanks for all your help with this topic and sorting things out. It's been
> quite helpful for my talk in a few weeks.
> Warner
> P.S. Would it be inappropriate to solicit feedback on an early version of
> my talk from this group? I'm sure they would be rather keener on catching
> errors in my understanding of Unix history than just about any other
> forum...

More information about the TUHS mailing list