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)
Achieve rapid application development and provisioning for hybrid cloud deployment.
Leverage a simplified and modern experience for easier installation, management and use of z/OS with no special skills required.
Build competitive advantage with cyber security solutions that help maintain exceptionally resilient environments.
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.
Easily 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.
Jumpstart or accelerate application modernization and take a standardized approach to IT automation.
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.
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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)
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Explore the technology and built-in resiliency capabilities of the IBM zSystems platform. (2.3 MB)