[geeks] Oldest OS Still Developed

[Geoffrey S. Mendelson]

On Wed, Oct 18, 2006 at 01:56:06PM -0400, Charles Shannon Hendrix wrote:
> 	- UNIX

Late 1970's.

> 	- MVS

Early to mid 1960's 

> 	- DOS/VE (I *think* it is still developed)

I think it post dates OS/360 from which MVS derives, but I am not sure.
By 1969 you had TOS (which I think was no longer supported), DOS, OS/360,
ACP and VM/360.

OS/360 still lives on as MVS, VM is still around, but most of it migrated
to hardware in the late 1980s. I don't know if anyone still uses ACP, 
and I have never seen a TOS system, but I have been using 360's (and on)
since the late 1960s.

> 	- PSOS
> 	- OS/9

Don't know about those.

> 	- RT/11

PDP-11s? New hardware my friend. :-) Weren't they the first machines to use
that silly reversed byte order?

> All of those are still used, and the last two I think might even still
> be maintained since they are still used in embedded systems and PDP
> clones.
> 
> Do the space shuttle computers have any kind of OS?

So? OS/360 was used by theMercury program, the shuttle is another new
system. The shuttle's computers were so bad that the astronauts were
carrying Grid Laptop PCs on flights.

Geoff.

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