News, programming tips and technical information for z/OS and mainframe Linux applications and systems programmers.

IBM home page for Virtual Telecommunications Access Method (VTAM); the z/OS version is part of Communications Server. Includes links to the latest version's announcement letter, documentation and storage estimates.

User group. Primary focus is z/OS systems programming.

IBM home page for Data Interfile Transfer, Testing, and Operations Utility for ESA (DITTO/ESA). Overview of features with links to support, news, library and more information. DITTO runs on VSE/ESA, z/VM and z/OS.

Categorized page of links for IBM mainframe programmers.

RACF-L: RACF Discussion List

An IBM monthly publication focused almost entirely on CICS.

User group spun off from GUIDE in 1995 and similar to SHARE, with annual conference aimed mainly at VSE/ESA and z/VM systems programmers.

Terms used by IBM subsidiary Tivoli. Glossary can be used on-line or downloaded in Adobe Acrobat .pdf file format.

Mainframe programming information, including a large dictionary and links to downloads and manuals.