[email protected] (Timothy Sipples) writes: > z/OS is UNIX(TM), certified by The Open Group and a trademark > bearer. Linux is not UNIX, as it happens. Apple's macOS is UNIX, while > iOS, tvOS, and watchOS are not. AIX is UNIX. The modern BSD family > operating systems derived from "Networking Tape 2" (NetBSD, FreeBSD, > OpenBSD, etc.) are not UNIX.
originally funded/developed by (renamed/reorged IBM disk division) ADSTAR software VP ... as part of trying to work around the communication group ... also provided venture/startup funding to entities doing distributed computing support that would use mainframe for disk storage. I've mentioned before that senior disk engineer got talk scheduled at world-wide, annual, internal communication group ... supposedly on 3174 performance ... but opened the talk that the IBM communication group was going to be responsible for the IBM disk division. The issue was that the communication group had corporate strategic responsibility for everything that crossed datacenter walls and were fiercely fighting off distributed computing and client/server ... trying to preserve their (emulated) dumb terminal paradigm and install base. The disk division was seeing data fleeing to more distributed computing platforms with drop in disk sales ... their efforts to correct the problems were constantly being veto'ed by the communication group. "POSIX" support was part of work-around (since it didn't directly involve crossing the datacenter walls) and funding distributed computing startups didn't directly challenge communication group IBM ownership of everything (IBM) that crossed the datacenter wall. The communication group stanglehold on mainframe datacenters didn't just disks ... and a few years later IBM goes into the red. POSIX ... portable operating system interface ... originally 1988 https://en.wikipedia.org/wiki/POSIX z/OS here https://en.wikipedia.org/wiki/POSIX#Compliant_via_compatibility_feature trivia: "ADSTAR" was the furthest along with reoganization of IBM into the 13 "baby blues" in preparation for breaking up the company. reference gone behind paywall, but mostly lives free at wayback machine http://web.archive.org/web/20101120231857/http://www.time.com/time/magazine/article/0,9171,977353,00.html then new CEO was brought in and the breakup reversed ... although as predicted ... IBM disk group no long exists ... even tho CKD DASD is still required ... but haven't been manufactored for decades, all being emulated on industry standard fixed-block disks. -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
