Doug -- IIRC IBM private-labeled a Microsoft put out a version of Xenix,
although I think it required an PC/AT (286)
ᐧ

On Tue, Apr 6, 2021 at 11:36 AM M Douglas McIlroy <
m.douglas.mcilroy@dartmouth.edu> wrote:

> > I wonder. IBM introduced the IBM PC in August of 1981.
> > That was years after a non-memory managed version of
> > Unix was created by Heinze Lycklama,  LSX. Is anyone
> > on this list familiar with Bell Labs management thoughts
> > on  selling IBM on LSX rather than "dos"?
>
> IBM famously failed to buy the well-established CP/M in
> 1980. (CP/M had been introduced in 1974, before the
> advent of the LSI-11 on which LSX ran.) By then IBM had
> settled on Basic and Intel.  I do not believe they ever
> considered Unix and DEC, nor that AT&T considered
> selling to IBM. (AT&T had--fortunately--long since been
> rebuffed in an attempt to sell to DEC.)
>
> Doug
>