Virtual Storage Extended
<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.
