"Dave McGuire said to me in strictest confidence"
> 
> On June 23, Matthias Buelow wrote:
> > CP/M was available for the 8080/Z80 architecture, the immediate
> > 8-bit predecessor to the 8086-based line of junk we still have
> > as PCs today (later, CP/M 86 was available for 8086 PCs aswell
> > but that was a rather irrelevant part of history.)
> 
>   CP/M was also available for 68K processors.
> 
>     -Dave McGuire
> 

Way back in antiquity, there was a PDP-11 OS called "DOS" (the acronym
is obvious). I remember working (however briefly) with one in school. 

-- 
-- Mark

   "640K Should be enough memory for anybody!" -- Bill Gates, 1981