Combines the industry leading SOA runtime and z/OS to deliver superior customer value

WebSphere Application Server provides the availability and security your business depends on while optimizing cost.

WebSphere Application Server for z/OS is the ideal infrastructure to deliver on business objectives and contain or even reduce costs for business critical applications utilizing the full capabilities of the z/OS.

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An application foundation optimized to take advantage of the unique qualities of service of IBM System z® hardware and the z/OS operating system, WebSphere Application Server for z/OS offers functional equivalence to WebSphere Application Server Network Deployment, along with additional capabilities such as prioritized workload management, advanced transactional integrity, intense scalability, and data and workload collocation, made possible through tight integration with IBM System z and z/OS.

Investment Protection

Protect investments in applications through reuse and integration. From service-enabling legacy assets to inventing new ones, our technology makes your business accessible to new users in innovative ways, giving you immediate insight and interaction with partners, suppliers and customers and increasing your return on investment.

Popular WebSphere Application Server for z/OS downloads

Redbook: WebSphere Application Server: Planning, Concepts, and Design

This IBM Redbooks® publication discusses the concepts, planning, and design of WebSphere Application Server environments.


System requirements

The minimum operating system and hardware requirements must be met on the server to support the basic installation and use of IBM® WebSphere® Application Server for z/OS. These requirements vary for each version and release. For the details on the software and hardware requirements for all versions, click on the links below.

WAS for z/OS V7


Operating SystemSoftwareHardware
AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS See the detailed software requirements See the detailed hardware requirements

WAS for z/OS V6.1


Operating SystemSoftwareHardware
z/OS, z/OS.e z/OS 1.6 (5694-A01), z/OS.e (5655-G52), or operating systems

Communications server (TCP/IP) or equivalent

z/OS UNIX® System Services and the hierarchical file system (HFS)

zSeries® File System (zFS) can be used in addition to the Hierarchical File System (HFS)

Security Server (RACF®) or equivalent security management product

System logger

System SSL security required when using SSL

Workload management in goal mode

Resource recovery services

The following z/OS elements, features, and components are optional:

IBM HTTP Server for z/OS or equivalent.

SecureWay® Security Server Lightweight Directory Access Protocol (LDAP) Server.

If your application environment uses a DB2® database, then DB2 Universal Database® (UDB) Server for OS/390® and z/OS, V7 (5675-DB2), or later, is required (may coexist with existing levels of DB2 programs used by other applications). CICS® Transaction Server (CICS TS)

If your application environment uses CICS TS, (5655-147), then CICS TS for OS/390 V2.2, (5697-E93), or later, is required.

If your application environment accesses CICS TS through the CICS Transaction Gateway (CICS TG) for z/OS, then CICS TG V6.0 or V6.1 (5655-M69) is required.

For details, visit

Information Management System (IMS™) — If your application environment accesses IMS through Java DataBase Connectivity (JDBC), or through IMS Connect/Connector for Java, then IMS V8 (5655-C56), or later, and appropriate maintenance is required. If, however, your application environment uses JCA 1.5, then IMS V9 (5655-J38) or later, and appropriate maintenance is required.

For details, visit
Any hardware that supports z/OS 1.6, or later

WAS for z/OS V6.0


Operating SystemSoftwareHardware
z/OS, z/OS.e z/OS 1.4 (5694-A01), z/OS.e (5655-G52), or operating systems

Communications server (TCP/IP) or equivalent

z/OS UNIX® System Services and the hierarchical file system (HFS)

Security Server (RACF®) or equivalent security management product

System logger

System SSL security required when using SSL

Workload management in goal mode

Resource recovery services
Any hardware that supports z/OS 1.4, or later

WAS for z/OS V5.1 - Server


Operating SystemSoftwareHardware
z/OS, z/OS.e z/OS (5694-A01) 1.2, or later, z/OS.e (5655-G52) 1.3, or later, operating systems

Communications server (TCP/IP) or equivalent

z/OS UNIX® System Services and the hierarchical file system (HFS)

Security Server (RACF®) or equivalent security management product

System logger

System SSL security required when using SSL

Workload management in goal mode

Resource recovery services.
Any hardware that supports z/OS 1.2, or later

WAS for z/OS V5.1 - Client


Operating SystemSoftwareHardware
Windows 2000, Windows 95, Windows 98, Windows NT Microsoft® Windows® 2000; Microsoft Windows NT® 4.0 (with server pack 3, or later); Microsoft Windows 95 (with server pack 1 or 2); or Microsoft Windows 98

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