<operating system> (VSE, formerly DOS/VSE) is a multitasking,
IBM 370-architected operating system similar to Multiple Virtual
Storage (MVS). VSE run jobs in partitions rather than address
spaces, and uses POWER for input/output rather than JES, but is
largely similar to MVS. Subsequent VSE/ESA releases gave VSE the
XA-370 channel architecture, 31-bit virtual and real storage
support, and data spaces. VSE is the IBM operating system on
one-third of installed IBM 4381s and a significant proportion of
IBM 9370s as well. It offers transaction processing and batch
processing capabilities well beyond Virtual Machine's current
capabilities, and has a close affinity with MVS. Try this search
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