Why z/OS

IBM® z/OS® delivers security, agile development and high utilization. It maintains application compatibility and runs Linux® on IBM Z® containers on-premises and in hybrid clouds.

Together with IBM z15™, z/OS gives you more performance, data privacy and cyber resiliency.

What’s new

IBM z/OS V2.5 now generally available!

IBM z/OS V2.5 is designed to enable innovative development to support hybrid cloud and AI business applications.

At a glance, z/OS V2.5 brings new opportunities for clients to:

  • Create better experiences for their developers and users through application modernization 
  • Fuel business growth with a standardized cloud-native approach and containerized workloads
  • Experience simplified and easier management of z/OS, without the need for specialized skills
  • Innovate with integrity with cyber security solutions that address evolving threats and new regulations
  • Build competitive advantage with a cyber-resilient infrastructure that predicts, responds, and recovers

Accelerate hybrid cloud

Deploy and manage Linux on Z apps on z/OS platforms

Provision with automated self-service processes

Deploy z/OS resources and services with cloud apps

Alternative enablement of z/OS Container Extensions

Develop applications

Provide Java language and function for z/OS

Run C, C++, COBOL, PL/I Fortran and assembler apps

Generate code without runtime dependencies

Help augment existing IBM Z application stacks

Parse documents with or without validation

Demystify Data with AI

Enable security

Enable extensive encryption of data in-flight and at-rest

Leverage biometrics to strengthen authentication

Encrypt and compress JES2-managed data

Protect data and resources and control permissions

Safeguard data dumps and protect data from vendors

Scan for vulnerabilities and remediate

Gain ease of use

Manage z/OS systems with a web-based interface

Simplify software installation and set-up

Automate workflows and Cloud Provisioning and Management assets

Simplify software maintenance

Simplify your upgrade to z/OS

Improve performance

Minimize disruptions and accelerate recovery

Respond to planned events by changing LPAR capacity

Report on nearly all aspects of z/OS performance

Summarize OS, middleware or workload activities

Define workload importance and performance goals

Manage systems

Build and deploy networking apps on z/OS

Configure processor’s channel subsystem and OS

Use a PC-based interface to HCD

Bring managed storage to a distributed network

Monitor and manage sysplex in JES2

Manage storage

Sort, merge, copy, analyze and report

Manage storage, data and devices

Manage data for copying and space reclamation

Get policy-based availability and management

Manage removable media as enterprise-wide library

Simplify data archiving with transparent cloud tiering (TCT)

Hear from customers

ICBC Data Center

“z/OSMF is a key component of our operating system rather than an independent product.”


Deliver fast, personalized customer services at scale with cutting-edge IBM technology.


Cut dev costs with Z Container Pricing and empower developers with RESTful APIs.

Featured resources

New communities

Participate to collaborate and learn from experts.

Flexible pricing

See how enterprise consumption and capacity solutions offer flexibility and savings.

Service test, container registry and service updates