SCO is still around in some form.  I believe it’s mostly just a support offering.  They converged on two products in the ‘90s:  OpenServer (SVR3) and UnixWare (SVR4).  It seems like most people preferred or were stuck on OpenServer while UnixWare would have eventually been a nicer system but I don’t know first hand.  They also shipped a version of FreeBSD 10 commercially a handful of years ago.

On Sat, Mar 20, 2021 at 6:32 PM Larry McVoy <lm@mcvoy.com> wrote:
So this is just me, I'm not a fan of SCO even though I was the guy that
added TCP/IP to that OS.

SCO just felt like it was the back burner.  Sun felt like it was the
front burner that was pushing things forward.  SCO was the team that
said they had this and did nothing with it.

On Sun, Mar 21, 2021 at 12:12:17PM +1100, Greg 'groggy' Lehey wrote:
> On Saturday, 20 March 2021 at 17:18:43 -0700, Larry McVoy wrote:
> > Yeah, but wouldn't that mean that SCO Unix had to be open sourced?
> > Or did they buy the rights?
>
> They didn't "open source" SCO, but in January 2002 they released
> "ancient Unix" under a "BSD-style" license.  See
> http://www.lemis.com/grog/UNIX/
> But I'm sure everybody knows that.
>
> > While I mostly can't believe anyone would want SCO Unix, I do know that
> > they ran a lot of cash registers, or maybe they were the server, I dunno,
> > somehow point of sale and SCO was a thing a long time ago.  So maybe it
> > is a legacy thing?
>
> I haven't been following SCO recently, but at some point they had
> taken UnixWare from Novell.  I'm sure that, too, is common knowledge.
>
> Greg
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Larry McVoy                  lm at mcvoy.com             http://www.mcvoy.com/lm