zVSE
zVSE is IBM's midrange mainframe operating system for IBM System z hardware. It is a member of the VSE family designed for reliability, modest footprint, and straightforward administration in small to medium enterprise environments. zVSE preserves the lineage from DOS/VSE and its successors and is presented as the System z option for customers who require a compact but capable mainframe operating system.
The DOS/VSE lineage began in the 1980s as an evolution of DOS/VS for IBM mainframes. It later
zVSE provides batch processing, online job entry, and data management facilities typical of mainframe environments. It
It runs in logical partitions on IBM Z hardware and can coexist with other operating systems, including
zVSE remains part of IBM's z/Software family and is used by organizations seeking a lightweight mainframe OS