IBM WebSphere® Application Server for Distributed Platforms and z/OS®: An Administrator’s Guide

Appendix F. Common z/OS Terms

This appendix highlights common z/OS terms used throughout the book.

Table F.1. Definition of Terms

Term/Acronym	Definition
z/OS and OS/390	The Z operating system is the latest in a series of multiple virtual storage operating systems running on the zSeries platform. zSeries is IBM’s large server or mainframe CMOS (complementary metal oxide semiconductor) architecture. WebSphere also supports the predecessor to z/OS named Operating System 390 (OS390).
zSeries	zSeries is the large server or mainframe platform including hardware, software, and all that entails. As an example, the distributed platform commonly known as AIX are the pSeries platforms, Intel based servers from IBM are known as xSeries, and RISC based architectures ...