Anyone heard of the S1 Operating System

Ray Jewhurst raywjewhurst at
Fri Feb 28 14:54:44 CST 2020

Does anyone know what processor S1 was for?


On Fri, Feb 28, 2020, 3:04 PM Peter Schow via cctalk <cctalk at>

> On Thu, Feb 27, 2020 at 6:20 PM Will Cooke via cctalk <
> cctalk at>
> wrote:
> > Reading through the April 85 issue of Byte, I came across a reference to
> the "S1 Operating System."  In Jerry Pournelle's column on pg 361 he talks
> about this mysterious OS.
> You can find mentionings of 32-bit capable S1 in trade publications
> (Computerworld, Datamation, etc.)  in the mid-80s timeframe, and there is
> an S1 button on eBay right now with the words "multi user, multi nodal,
> multi tasking, multi processing". In a quick scan, I saw announcements of
> some S1 OEM agreements, including  Phillips Medical.   It was a product of
> Multi Solutions, a startup out of Lawrenceville, NJ, so you'd sort of
> assume that some  Bell Labs talent was on staff.  S1 was trademarked in
> 1986, it expired in 1993.

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