OS/390 is an IBM operating system for the System/390 IBM mainframe computers. == Overview == OS/390 was introduced in late 1995 in an effort to simplify the packaging and ordering for the key, entitled elements needed to complete a fully functional Multiple Virtual Storage (MVS) operating system package.
OS/390 is an IBM operating system for the System/390 IBM mainframe computers. == Overview == OS/390 was introduced in late 1995 in an effort to simplify the packaging and ordering for the key, entitled elements needed to complete a fully functional Multiple Virtual Storage (MVS) operating system package.
Source: Wikipedia "OS/390" · CC BY-SA 4.0
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