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Date: Wed, 14 Jul 2021 07:09:10 -0700
From: Larry McVoy <lm@mcvoy.com>
To: Lars Brinkhoff <lars@nocrew.org>
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On Wed, Jul 14, 2021 at 09:07:19AM +0000, Lars Brinkhoff wrote:
> Michael Kj??rling wrote:
> > And all this, of course, ignoring the other issue of what might be
> > considered a "start to the open source operating system movement",
> > given that even development of GNU was well underway by the time the
> > Linux kernel got started (having been worked on since early 1984)
> 
> GNU planned to adopt TRIX which was developed at MIT in the mid 1980s.
> I don't know its exact distribution terms, but Wipikedia says "open
> source" so it was possibly in that general vicinity.
> 
> Arguably ancient PDP-10 operating systems like ITS, WAITS, TENEX were
> somewhat "open" and "free", but it's not a clear cut case.

X10 and X11 predate all of this and at least X11 is open source.
-- 
---
Larry McVoy            	     lm at mcvoy.com             http://www.mcvoy.com/lm