Unix History

[Matt Perez]

> 
> This raises the burning question:  whatever happened to
> Systems I and II, and, especially, IV?  I never hear them
> discussed.  Were they ever released commercially, and if
> not, why not?
> 
> 					Scott Anderson
> 					ihnp4!oddjob!kaos!sra

System IV was in use within the Labs in (memory don't
fail me now) the latter part of 1980.  It was never
released commercially because as SIV was released, SV
was already targeted to be the system that was going to
be released within and without Ma Bell at the same time.
Up until then, a system was released in-house and
external release would lag for as much as a couple of
years or not at all.

I know somebody who ran SI and SII at Teletype in or
around 1978-1979.

-- 
{amd,att,cbosgd,calma,cayuga,dual,idi,ihnp4,intel,imagen,nsc,qubix,qumix,sun,wamo,wcwvax,weitek}!saber!matt