SyStem> (VSE, formerly DOS/VSE) iS a multitaSking, IBM 370-architected operating SyStemSimilar to Multiple Virtual Storage (MVS). VSE run jobS in partitionS rather than addreSSSpaceS, and uSeSPOWER 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. (1997-06-09)