IBM® z/OS® is an operating system (OS) for IBM Z® mainframes, suitable for continuous, high-volume operation with high security and stability. Scale the value of data and drive digital transformation that …

z/OS®, a widely used mainframe operating system, is designed to offer a stable, secure, and continuously available environment for applications running on the mainframe.

The z/OS basic skills information center is the fastest way to learn and become productive on z/OS. Once you've learned the basic z/OS concepts and skills presented here, you can find the z/OS …

Apr 22, 2018 · The course addresses z/OS access and interaction basics, data sets and data access methods, and operating system environment topics. No prior experience with mainframes and the …

z/OS is known for its ability to serve thousands of users concurrently and for processing very large workloads in a secure, reliable, and expedient manner.

Run thousands of Linux on IBM Z virtual machines on one system–as well as z/OS and z/TPF—with reliability, performance, system management and security for your applications.

Mar 29, 2011 · Introduction to z/OS and the mainframe environment Chapter 1. Introduction to the new mainframe Chapter 2. Mainframe hardware systems and high availability Chapter 3. z/OS overview …

IBM Z mainframes run on z/OS®, Linux®, z/TPF, and z/VM®, delivering AI integration, security, and resiliency. Reduce energy consumption by consolidating selected x86 workloads onto a single …

z/OS provides each user with a unique address space and maintains the distinction between the programs and data belonging to each address space. Within each address space, the user can start …

Jun 13, 2025 · The z/OS 3.1 Upgrade Workflow provides the steps for upgrading to z/OS 3.1 from your currently supported z/OS system. For more information, see “z/OS 3.1 Upgrade Workflow” on page 21.