IBM had DOS for it's 360 series computers starting in mid-60s. (The 360 was
introduced in 1965. it's primary OS was OS. There we 4 IBM operating
systems for the 360 series. DOS for the smaller ones, OS/MFT, OS/MVT and
finally VM. VM was only available on one high end model and was the first
IBM virtual memory OS. IBM was one of the last vendors to offer virtual
memory on their mainframes. DOS became DOS-VS, OS/MFT became OS/VS1 and
OS/MVT became OS/VS2 which morphed to MVS. VM became VM-370.
"Jerry Eckert" wrote:
> >1st version of DOS was QDOS, by, I believe, Seattle Computer Company.
>
> Correction: 1st version of DOS for IBM PCs.
>
> DOS is an acronym for Disk Operating System. There was a version of DOS
> running on PDP-11s in the early 70s, and I'm almost certain there were
> earlier versions for some mainframes.
--
Jerry Feldman <[EMAIL PROTECTED]>
Boston Linux and Unix user group
http://www.blu.org
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