IBM z/OS® is an operating system (OS) for IBM Z® 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 Z 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.
IBM z/OS 3.1 marks a new era in OS intelligence. The new version of z/OS allows you to:
IBM extends generative AI-powered watsonx Code Assistant to accelerate mainframe application modernization.
Data sheet: Deep dive into the product details for IBM z/OS
Explore past z/OS announcements
Take a deep dive into the product details for IBM z/OS.
Explore some of the most frequently asked questions about z/OS V2.5.
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.
Investigate why IBM Z is the ideal AI platform for solving user pain points.
Understand how hardware and software components interact within a z/OS data set encryption environment.
See the latest enhancements to this fully functioning tape management system for removable media.
Find out how IBM zHyperLink for IBM z/OS makes it easy to accelerate transaction processing for the mainframe.
Discover how hardware components and software components interact in a z/OS data set encryption environment.