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