I think your dates are wrong.
VM was CP67 released in guess what year?
MVS was first released in 1974.
SVS was OS/VS1 and MVS was OS/VS2, IIRC.
I'm sure, if I'm wrong, somebody'll correct me.
-
-teD
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Original Message
From: DASDBILL2
Sent: Monday, March 17, 2014 15:09
To: IBM-MAIN@LISTSERV.UA.EDU
Reply To: IBM Mainframe Discussion List
Subject: Re: Difference between MVS and z / OS systems
Close. OS/VS2 was released having been already pre-morphed into SVS and MVS.
SVS was first called OS/VS2 Release 1, was first available in 1974, and that's
when I worked with it. MVS was first called OS/VS2 Release 2, was first
available slightly later (1975, I think), but I didn't begin working with MVS
until 1977. VM was also first released around 1975. Other grand buzzwords
that morphed were "loosely coupled multiprocessing" and "tightly coupled
multiprocessing". The loose version became shared SPOOL, and the tight version
became simply multiprocessing (several CPUs sharing the same central storage).
And now we have SYSPLEXEs with both loosely and tightly coupled systems
comPLEXly interwoven. Your date of 1980 for MVS is about the time when MVS's
initially disappointing performance and RAS were greatly improved.
Bill Fairchild
----- Original Message -----
From: "Gary Shiminsky" <gary.shimin...@doit.nh.gov>
To: IBM-MAIN@LISTSERV.UA.EDU
Sent: Monday, March 17, 2014 1:13:21 PM
Subject: Re: Difference between MVS and z / OS systems
Hi,
If my memory serves me right, back in the 1970s there was OS/MFT, OS/MVT,
OS/VS1, and OS/VS2.
OS/VS2 morphed to OS/SVS and then OS/MVS(? Or maybe just MVS) starting in
the 1980s.
I worked on OS/VS1 Rel 7 back in the 79-80 time frame. I didn¹t get back
to MVS till the mid 90¹s.
Gary
Gary L. Shiminsky
Senior zVM/zVSE Systems Programmer
Mainframe Technical Support Group
Department of Information Technology
State of New Hampshire
27 Hazen Drive
Concord, NH 03301
603-271-1509 Fax 603-271-1516
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-----Original Message-----
From: John Eells <ee...@us.ibm.com>
Reply-To: IBM List <IBM-MAIN@LISTSERV.UA.EDU>
Date: Monday, March 17, 2014 at 1:51 PM
To: IBM List <IBM-MAIN@LISTSERV.UA.EDU>
Subject: Re: Difference between MVS and z / OS systems
>Helio Jose Da Silva wrote:
>> Hello list,
>>
>> Someone can tell me the relevant differences between the MVS and z / OS
>>systems?
>
>MVS was the prior name of what has become z/OS. What was started out as
>MVS in 1974 was renamed to:
>
>MVS/SP Version 1
>MVS/XA Version 2 in 1981
>MVS/ESA Version 3 (1988), Version 4 (1991), and Version 5 (1994)
>OS/390 (1996)
>z/OS (2000)
>
>Along the way have come a plethora of new and enhanced functions. There
>are more differences than there is time to list them. However, we still
>call the "base control program" (BCP) "MVS" in many contexts, such as in
>the names of various z/OS books, to differentiate it from the other
>70-ish parts ("elements") of z/OS.
>
>--
>John Eells
>z/OS Technical Marketing
>IBM Poughkeepsie
>ee...@us.ibm.com
>
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