19 Jun
2024
19 Jun
'24
3:15 a.m.
On Tuesday, June 18th, 2024 at 1:59 PM, Dave Horsfall <dave(a)horsfall.org> wrote:
On Tue, 18 Jun 2024, segaloco via TUHS wrote:
It has left its droppings out there in the world, some of which were held onto by Arnold
Robbins: https://www.tuhs.org/Archive/Documentation/Manuals/Unix_4.0/
And others found by myself on eBay and reconstructed:
https://gitlab.com/segaloco/pwb4u_man
The story I've gotten is AT&T policy was to release odd-numbered versions, so PWB
1.0, System III, and System V made it out into the world, PWB 2.0 and Release 4.0 stayed
in the labs. In the most technical sense, System IV never existed, what could've
become it remained a Bell System-only issue.
- Matt G.
I have Andy Tanenbaum to thank in part for my
interest in turning up
UNIX 4.0 information due to the quote:
"Whatever happened to System IV is one of the great unsolved mysteries
of computer science."
From Modern Operating Systems. I took this as an impudent challenge and
well here I am.
Well, don't keep us in suspense; what happened to SysIV? Not that I'm a
fan of either SysIII or SysV...
-- Dave