Virtual Storage Extended


Virtual Storage Extended

(operating system)(VSE, formerly DOS/VSE) is amultitasking, IBM 370-architected operating systemsimilar to Multiple Virtual Storage (MVS).

VSE run jobs in partitions rather than address spaces, anduses POWER for input/output rather than JES, but islargely similar to MVS. Subsequent VSE/ESA releases gaveVSE the XA-370 channel architecture, 31-bit virtual and realstorage support, and data spaces. VSE is the IBM operatingsystem on one-third of installed IBM 4381s and a significantproportion of IBM 9370s as well. It offers transaction processing and batch processing capabilities well beyondVirtual Machine's current capabilities, and has a closeaffinity with MVS.