Mainframe operating systems

IBM z/OS is a widely-used mainframe operating system designed for a stable, secure and highly available environment. z/OS offers security to protect sensitive information and assets. With resiliency, scalability and speed, z/OS helps exceed availability and response time objectives for business applications.

Open source Linux distributions run on IBM Z, benefitting from the mainframe’s high data security, operational efficiency, availability and performance. Linux on Z provides an enterprise platform for cloud and analytics. Coupled with virtualization, a single mainframe can run up to thousands of virtual Linux servers concurrently.

This leading hypervisor for critical workloads can run thousands of Linux on Z virtual machines on one mainframe and can host z/OS, z/VSE and z/TPF. IBM z/VM’s reliability, performance, system management, scalability and security offer a strong foundation for Linux applications.

IBM z/VSE is an easy to manage and widely-used IBM mainframe operating system for reliable and secure online transactions and batch workloads. It can be integrated in a hybrid IT environment with z/VSE Connectors and enhanced with new workloads in a colocated Linux on Z environment.

The z/Transaction Processing Facility (z/TPF) is a special-purpose mainframe operating system used to process very high transaction volumes, such as credit card transactions and airline reservations. It handles near real-time transactions with the high quality service of the IBM Z mainframe.