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. -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Timothy Sipples Sent: Wednesday, July 3, 2024 8:46 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: OS/VS2 Release 2: Happy 50th Anniversary! My colleagues point out an interesting anniversary. IBM introduced OS/VS2 Release 2 (IBM Program Number 5752-VS2) on July 3, 1974. The history is a little complicated, but essentially it's the date when "MVS" was born. Today's z/OS 3.1 operating system is the direct, lineal descendent of OS/VS2 Release 2. Of course z/OS is vastly more capable and broader in scope. Happy 50th anniversary! OS/VS2 Release 2 was WAY before my time. Do you have any personal memories? ————— Timothy Sipples Senior Architect Digital Assets, Industry Solutions, and Cybersecurity IBM Z/LinuxONE, Asia-Pacific sipp...@sg.ibm.com ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN