Cheryl Watson specializes in z/OS tuning. This site offers access to some of her free reports and details on how to acquire her chargeable materials, including her Tuning Newsletter, CPU chart, classes on video, and BoxScore and GoalTender software.

Student guides for TSO (ISPF), CICS, MVS QuickRef, AbendAid, local JCL standards and a small glossary.

Short article with many embedded links describing Operating System/360 (OS/360), the original ancestor of z/OS that was written as the operating system for high-end System/360 computers in the early 1960s.

Published twice annually by IBM for z/OS Systems Programmers, with one to five page technical articles. Available on-line in PDF format.

On-line access to manuals covering all components of z/OS. Requires no special reader, though it does simulate IBM BookManager.

Web-based wizards for infrequent z/OS Systems Programming tasks.

IBM security features with and products for z/OS.

Announcement, general availability, marketing withdrawal and end of support dates and program numbers for z/OS, OS/390 and MVS/ESA.