IBM z/OS® is a operating system for IBM zSystemsTM mainframes, suitable for continuous, high-volume operation with high security and stability.
With IBM z/OS, you can bring the computing power and resources of the IBM zSystems platform to help drive business transformation and accelerate innovation. Get the stable, secure environment your organization requires to improve performance for mission-critical workloads and meet future challenges.
The next version of z/OS intends to be an AI-infused, hybrid cloud operating system. With new and enhanced features designed to be a resilient, secure, and simplified platform for the future of industry’s most critical workloads.
Data sheet: Deep dive into the product details for IBM z/OS. (862 KB)
Deep dive into the product details for IBM z/OS. (862 KB)
Explore some of the most frequently asked questions about z/OS V2.5. (425 KB)
Read the guide to learn how to run C, C++, COBOL, PL/I Fortran and assembler apps.
Learn more about installing, tailoring and configuring zCX in your own environment. (15.4 MB)
Learn why IBM zSystems™ is the ideal AI platform for solving user pain points. (1.2 MB)
Learn how hardware and software components interact in a z/OS data set encryption environment. (4.7 MB)
See the latest enhancements to this fully functioning tape management system for removable media. (4.1 MB)
Find out how IBM zHyperLink for IBM z/OS makes it easy to accelerate transaction processing for the mainframe. (3.7 MB)
Explore the technology and built-in resiliency capabilities of the IBM zSystems platform. (2.3 MB)