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
Scale the value of data and drive digital transformation powered by AI and intelligent automation.
Build new applications or modernize existing ones while optimizing and simplifying technology infrastructure.
Protect and thrive with unparalleled security and resilience capabilities with quantum-safe technologies.
Improve z/OS programmer productivity with a web-based interface and streamlined, automated tasks.
Enable and drive innovative development to support new hybrid cloud and AI business applications.
Integrate popular open-source packages, Linux® applications, IBM software and third-party software.
Simply create software service templates that provision IBM middleware for additional functionality.
Easily create and access JSON databases through a comprehensive set of C-based APIs.
Deploy services that streamline management tasks and apply best practices and internal standards.
Restore services and recover workloads substantially faster with zero increase in licensing costs.
Rapidly adapt and respond to disruptions or threats and continue operations without significant impact.
Enable extensive encryption of data in-flight and at-rest to safeguard data and achieve compliance.
Use serverless data movement and storage cloud communication to simplify data archiving in the cloud.
Run multiple copies of z/OS as a single image, so you can manage multiple systems and resources from a single point of control.
Orchestrate configuration management, application deployment and provisioning IT tasks on z/OS.
Download open-source, no-cost container images that can run in Linux and zCX environments of z/OS.
Jump-start or accelerate application modernization and take a standardized approach to IT automation.
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.