OS390Operating System 390 (supersedes MVS/ESA)
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Softek Storage Manager 2.1 supports almost all operating systems deployed in enterprise environments, including Microsoft Windows NT/2000/XP, Sun Solaris 2.6,7 and 8, Hewlett-Packard HP/UX 11 and 11i, IBM AIX 4.3.3 and 5.x, Linux and OS390 and zOS.
in the IBM OS390 benchmarking tool called the PAIO driver.
IBM has now started to ship the first version of z/OS - the successor to the OS390 operating system which has been running IBM mainframes for years.