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"MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx> wrote on 05/02/2017
02:08:39 PM:
In regard to z/VSE, that appears to be one of the 4 - just a z/OS name
change, AFAIK.

Two different operating systems. The names of those two operating
systems have been as follows -- and I may be missing a few:

OS/360 ==> OS/VS ==> OS/VS2 ==> OS/MVS ==> MVS/SE ==> MVS/SP ==> MVS/XA
==> MVS/ESA ==> OS/390 ==> z/OS

DOS/360 ==> DOS/VS ==> DOS/VSE ==> VSE/SP ==> VSE/ESA ==> z/VSE


"MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx> wrote on 05/02/2017
02:13:37 PM:
VSE is a mainframe guest OS that apparently runs under Z/OS.
Previously it used to run under VM. We ran VM/VSE on an
ES9000 for a few years :)

z/VSE cannot run under z/OS -- only under z/VM or standalone in
its own mainframe LPAR.


Sincerely,

Dave Clark

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