Don't forget the other 1972 arrivals. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר
________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Mike Schwab <[email protected]> Sent: Tuesday, July 9, 2024 2:58 AM To: [email protected] Subject: Re: OS/VS2 Release 2: Happy 50th Anniversary! 1972 OS/VS1 introduced Virtual Storage. 1974 OS/VS2 introduced Multiple Virtual Storage 1983 MVS/XA introduced 31 bit storage / I/O subsystems 1988 ESA introduced Access Registers 2000 z/OS introduced 64 bit memory. On Mon, Jul 8, 2024 at 11:23 PM Timothy Sipples <[email protected]> wrote: > > Michael Schmitt wrote: > >What's surprising to me is that z/OS is coming up on 24 years old: > >1974: OS/VS2R2 > >1978: MVS/SE > >1980: MVS/SP > >1983: MVS/XA > >1988: MVS/ESA > >1995: OS/390 > >2000: z/OS > >Look back at the big architectural changes in MVS. So big that they > >necessitated a change in the product name each time. [Except OS/390, > >which was packaging and marketing 😊 ] > >Compared to that, z/OS seems to be stagnant. Or stable, take your > >pick. > > Well, a few points: > > 1. z/OS was introduced with the introduction of 64-bit addressing > (z/Architecture). 16 EiB of real addressable memory is still a fairly large > amount. The current model IBM z16 tops out at just shy of 40 TiB (~0.0000381 > EiB). Some architectural improvements have more longevity than others. Anyone > remember "extended real addressing"? > > 2. Did the name really change from 1978 to 1995? It's all "MVS," merely with > suffixes. > > 3. CICS has kept its name since at least 1968, although it dropped a prefix > in 1969. It's a good name! It's also a radically different and vastly more > capable product now. > > 4. If you want you can formally ask IBM to change the name. > > ————— > Timothy Sipples > Senior Architect > Digital Assets, Industry Solutions, and Cybersecurity > IBM Z/LinuxONE, Asia-Pacific > [email protected] > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
