z/OS Last modified: Friday, December 01, 2006
Often abbreviated as ZOS, z/OS is IBM's mainframe operating system. It is a 64-bit operating system that supports Java, UNIX, API's, and TCP/IP to name a few features.  z/OS.e is a specially priced, slimmed-down offering of z/OS. It provides select functions but  uses the same code base as z/OS and invokes an operating environment that is comparable to z/OS in service, management, reporting, and reliability. The first name for IBM's mainframe operating system was MVS (Multiple Virtual Storage), which was succeeded first by OS/390 and then z/OS. See also MVS.
•E-mail this definition to a colleague• For internet.com pages about z/OS . Also check out the following links! IBM z/OS  IBM's Web page for z/OS, its flagship mainframe operating system. z/OS and z/OS.e  An IBM Web page comparing and contrasting its z/OS and z/OS.e operating systems.	Operating Systems .NET IBM mainframe MVS operating system SOA TCP/IP UNIX VSAM Give Us Your Feedback Shopping z OS Products Compare Products,Prices and Stores Shop by Category: Software 50 Store Offers Digital Cameras 34 Model Matches PDAs 1 Model Matches Sport and Outdoor 27 Store Offers