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From: Bob Broderbund <bbroderbund@broderbund.com>
Newsgroups: comp.lang.ada
Subject: Re: Could you write a BSD like os in ADA?
Date: Wed, 24 Aug 2016 15:53:17 +0000 (UTC)
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Date: 2016-08-24T15:53:17+00:00
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On 2016-08-24, already5chosen@yahoo.com <already5chosen@yahoo.com> wrote:
> On Wednesday, August 24, 2016 at 6:15:09 PM UTC+3, Bob Broderbund wrote:
>> On 2016-08-23, already5chosen@yahoo.com <already5chosen@yahoo.com> wrote:
>> > On Monday, August 22, 2016 at 12:49:07 PM UTC+3, Bob Broderbund wrote:
>> >> On 2016-08-22, Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote:
>> >> > On 22/08/2016 07:01, J-P. Rosen wrote:
>> >> >> Le 22/08/2016 ?? 02:18, Andrew Shvets a ??crit :
>> >> >>> What would you consider to be a well designed operating system?
>> >> >>
>> >> >> VMS! :-)
>> >> >
>> >> > Yes, VMS was likely the best OS ever.
>> >> 
>> >> Close.. try another permutation of the same letters!
>> >> 
>> >> Hint: it's the oldest OS still in development and production, and processes
>> >> 95% or more of the world's financial transactions.
>> >>
>> >
>> > IBM MVS/zOS is ~42 y.o. It is certainly not the oldest OS still in
>> > development and production.
>> 
>> MVS started in 1964. That's 52 years, not 42. Bad day to play hooky from
>> math class?
>
> No, you had a bad day in history class.
> MVS first shipped in 1974 as OS/VS2 Release 2.

Oh, I see. You want to play word games.

OS/360 developed into MVS which developed into MVS/XA which developed into
MVS/ESA which developed into OS/390 which developed into z/OS. It's the
evolution of the same OS, it's all upward compatible. It's so upward
compatible you can run object code from OS/360 on today's latest version of
z/OS.

Since you failed your computer history class you didn't know that MVS people
use MVS as a generic name for _all_ these OSs unless we have a reason not
to. Most of the time we just call it MVS. So does IBM.

Bob, who started working on MVS in 1975 after MVS was already 11 years old.