[Info-vax] OS Ancestry

[Bill Gunshannon]

I have become very curious about the ancestry of VMS.  (I am
going to look into some others, but for VMS I do have this
outlet for information!)

Both Primos and Unix came from people recently working on
Multics.  Primos went in the same direction as Multics while
Unix appeared to go in a very different direction.

VMS is more similar to Primos than Unix.  I have seen it said
that RSX-11 was the immediate parent of VMS.  Was that true?
Given that, what is the ancestry going back even further?
Where did VMS actually get its start paradigm-wise?

Anybody here have any of this information?

bill