Am 24.01.2019 um 18:01 schrieb R.S.:
W dniu 2019-01-24 o 14:44, Parwez Hamid pisze:
All depends whether you are asking about 'current' Z systems or the
older ones.
You can add the following:
KVM
Hitachi’s operating system, VOS
Well, IT DEPENDS.
KVM is Linux based hypervisor. Is it OS? Maybe, like z/VM. Is it
Linux? Maybe, but specialized.
VOS is just (almost legal) clone of MVS, like Fujitsu MSP. Due to
legal settlements both are not available outside of Japan, AFAIK.
There are also BS2000 (Siemens mainframe) OSes, similar to MVS and VSE
AFAIK, but it's hard to find out real roots. I heard both are cloned
with (paid) agreement from IBM.
BS2000 is a genuine Siemens OS, later transferred to Fujitsu and called
BS2000/OSD.
It ran on 370 and 390 compatible machines, but was very different from
MVS or VSE, AFAIK.
Its origins are some older OSes targetting other architectures similar
to IBM 360 (RCA Spectra ...).
There was a BS3000, too, which was the same as MVS, but Siemens (or
Fujitsu) had to
cancel it due to legal problems with IBM, IIRC.
https://en.wikipedia.org/wiki/BS2000
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