(MVS) Release 2 of
OS/VS2, called MVS
because it had multiple 16 MB virtual address spaces, in
contrast to
SVS. MVS ran on the IBM 390 series
mainframes. It became MVS/SP, then MVS/XA (with 31-bit
addressing) and then MVS/ESA.
MVS/Open Edition (MVS/OE), aimed at the growing
open systems
market, added
TCP/IP and
Unix support in an MVS address
space, allowing users to run IBM,
CICS-type applications,
batch applications and Unix.
MVS/ESA was repackaged as
OS/390 as a marketing exercise but
it's basically the same thing.
Version: 5.1.