[TUHS] Genealogy of PDP-11 Unix

[Warner Losh]

OK. So I should ignore it then...  Thanks for the clarification...

Warner

On Mon, May 21, 2018 at 4:48 PM, Clem Cole <clemc at ccc.com> wrote:

> @Warner Losh - the picture with the blue balloons is so wrong....   There
> are a ton of errors, starting with claiming PWB 1.0 came from Fifth Edition
>
> On Mon, May 21, 2018 at 3:22 PM, Warner Losh <imp at bsdimp.com> wrote:
>
>> In case people are wondering, I found this https://www.quora.com/Wha
>> t-is-Unix-and-why-is-it-important which contains a blue-oval chart that
>> shows it being derived from CB Unix 3. But that the sources were also
>> different than the ones for VAXen, etc. At least that's the implication
>> here. Is this chart in error?
>>
>> Warner
>>
>>
>> On Mon, May 21, 2018 at 2:30 PM, Clem cole <clemc at ccc.com> wrote:
>>
>>> It contains Features from CB Unix but was not the same thing.  In
>>> particular shared memory and semaphores were contributed by Dale’s team but
>>> it was PWB 3.0 that was rebranded system III and then updated and released
>>> by USG aka summit eventually as sys V.   System IV was not released outside
>>> the bell system I’m not sure if it ever went out inside.
>>>
>>> Sent from my PDP-7 Running UNIX V0 expect things to be almost but not
>>> quite.
>>>
>>> > On May 21, 2018, at 1:22 PM, Warren Toomey <wkt at tuhs.org> wrote:
>>> >
>>> > I had an e-mail from someone who said:
>>> >
>>> >  PDP-11 Sys V is apparently derived from Unix CB 3.0, not from the
>>> >  normal route... Or so says the great interweb :)
>>> >  I found a family tree that suggests this. Know anything about this?
>>> >
>>> > I hadn't heard of this before, can anybody substantiate or negate this
>>> > assertion, or shed more light on the genealogy od PDP-11 System V?
>>> >
>>> > Thanks, Warren
>>>
>>
>>
>
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