IBM z/OS and OS/390 Expo
The next IBM z/OS and OS/390 annual technical conference. Focusing first and foremost on performance issues, 4.5 days.
http://www.ibm.com/services/learning/conf/us/os390

SimoTime
Provides z/OS-based mainframe application concepts, techniques and examples, with special emphasis on integration with the Internet. Hosted by a California consulting firm.
http://www.simotime.com

OS/360 Obituary
On August 9, 1972, D.A. Jardine wrote this humorous obituary for Operating System/360 (OS/360), the original ancestor of z/OS.
http://ldworen.net/fun/os360obit.html

Bill's Big Iron Page
Both links and original material covering common programming problems in the z/OS environment. By Canadian Bill Lalonde.
http://www.members.tripod.com/~billlalonde/

Vanguard Enterprise Security Expo
Annual security conference intended for organizations using RACF, but covering non-mainframe-specific topics, such as smart cards and digital certificates.
http://www.go2vanguard.com/expo

Watson & Walker
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.
http://www.watsonwalker.com

ASU IT FYI: Arizona State University On-line Mainframe MVS/TSO Help
Detailed usage information on a broad range of commonly-used z/OS software. Some is specific to ASU's academic mainframe.
http://www.asu.edu/it/fyi/mvs

North Carolina State University: z/OS
The NCSU Administrative Computing Services mainframe overview, with detailed ISPF, IOF and ftp usage instructions.
http://www.acs.ncsu.edu/MVSsystems

SDSF and ISPF Quick Reference Guides
Introductory information on using SDSF and ISPF, showing the actual screens you will see. In Adobe Acrobat .pdf format from the U.S. Environmental Protection Agency's Safe Drinking Water Information System/Federal Version (SDWIS/FED).
http://www.epa.gov/safewater/sdwisfed/qrg.html

GSU: Georgia State University IS&T Help Center Services
Includes step-by-step instructions to create and compile COBOL and FORTRAN programs on the z/OS mainframe.
http://www.gsu.edu/~wwwhcs/online.htm

University of Georgia Mainframe
Detailed usage information for z/OS JCL, TSO, ISPF and z/OS Abend codes.
http://www.eits.uga.edu/hostsys/mvs/

MVS Forums
Help Boards provide question and answer discussion threads on z/OS application programming, databases, utilities, JCL, Middleware including CICS, IMS, TSO, ISPF, data management and problem determination. There are also links to IBM manuals.
http://www.mvsforums.com

OSdata.com on MVS
A Web site that looks at operating systems, takes a look at MVS, now officially known as z/OS.
http://www.osdata.com/oses/mvs.htm

LDW's Quick and Dirty MVS Page
Leonard Woren's favourite z/OS software and links.
http://ldworen.net/mvs

TSO Times
On-line newsletter of technical articles related to TSO and ISPF, with lots of REXX-related information. Includes some articles on the company's (Chicago-Soft) mainframe software products.
http://www.TSOTimes.com

Western Illinois University: StuMVS System
Student guides for TSO (ISPF), CICS, MVS QuickRef, AbendAid, local JCL standards and a small glossary.
http://mvs.wiu.edu/stumvs

StorageTek: z/OS Support Commitment
StorageTek's policy statement detailing their products' support for IBM mainframes and their operating systems.
http://www.support.storagetek.com/GlobalNavigation/Support/NewsAndUpdates/OS390/OS390Index.htm

PeopleSoft on the Mainframe
Performance tips for PeopleSoft running on z/OS DB2. From consulting firm DataBase Consulting Services (DBCS).
http://www.db-consulting.com/links.htm

MVS by Thierry Falissard
Favourite links of a man with a passion for MVS (now z/OS), including many to original material on his own OS/390-MVS Cyber Mall site.
http://www.os390-mvs.freesurf.fr/mvs.htm

VSAM Support in TSO, ISPF and REXX
Explains how to use VSAM in TSO, ISPF and REXX. Part of Gilbert Saint-Flour's mainframe Web site.
http://gsf-soft.com/Documents/TSOVSAM.shtml

DOCWEB: The CNS Documentation System
Instruction manuals, Frequently-Asked Questions (FAQs) and News for students and other users of the mostly-mainframe University of Florida (UF)Computing and Networking Services (CNS).
http://docweb.nerdc.ufl.edu/cgi-bin/docweb

UnXMIT Information Exchange
Details on how to write a program for operating systems other than z/OS that will read a z/OS Partitioned DataSet (PDS, also known as a Library) that been sent with TSO's TRANSMIT (XMIT) command.
http://www.planetmvs.com/unxmit/

MVS SHARE Project
As well as a description of the MVS Project, under which all z/OS activities of the SHARE user group are organized, there are also useful Web links.
http://www.share.org/Volunteer_Center/programs/mvs_project.cfm

Wikipedia OS/360 Encyclopedia Entry
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.
http://en.wikipedia.org/wiki/OS/360

Testing z/OS
An IBM Systems Journal article describing how the z/OS development team tested the operating system. Discusses verification methodologies, and test technologies and techniques.
http://researchweb.watson.ibm.com/journal/sj/411/loveland.html

LE: Language Environment
The IBM common run-time environment for popular programming languages.
http://www-03.ibm.com/servers/eserver/zseries/zos/le/

RMF: Resource Management Facility
IBM's performance measurement and management software.
http://www-03.ibm.com/servers/eserver/zseries/zos/rmf/

SDSF: System Display and Search Facility
IBM software to view and control the JES2 queues, running batch jobs, started tasks, and on-line TSO users.
http://www-03.ibm.com/servers/eserver/zseries/zos/sdsf/

RACF
IBM home page for Resource Access Control Facility (RACF) security software. Introduction with links to a technical overview, news, downloads, user groups, past and future presentations, migration, library, FAQs and education.
http://www-03.ibm.com/servers/eserver/zseries/zos/racf/

z/OS Security
IBM security features with and products for z/OS.
http://www-03.ibm.com/servers/eserver/zseries/zos/security/

DFSMShsm
Originally the Hierarchical Storage Manager (hsm), now "a functional component of DFSMS that provides facilities for managing storage devices" (IBM).
http://www-03.ibm.com/servers/storage/software/sms/hsm/

z/OS IBM Manuals
On-line access to manuals covering all components of z/OS. Requires no special reader, though it does simulate IBM BookManager.
http://www-03.ibm.com/servers/eserver/zseries/zos/bkserv/

z/OS
IBM home page for zSeries/Operating System (z/OS). Information on the latest version with links to an overview, recent announcements, software, migration and installation, news, support, downloads, education, library and ease of use issues. z/OS replaced OS/390 (which replaced MVS) when IBM eserver zSeries 900 (z900) replaced System/390 enterprise servers (mainframes).
http://www-03.ibm.com/servers/eserver/zseries/zos/

SMP/E: System Modification Program Extended
The software used to install and maintain z/OS software from IBM and many other software companies.
http://www-03.ibm.com/servers/eserver/zseries/zos/smpe/

z/OS Hot Topics Newsletters
Published twice annually by IBM for z/OS Systems Programmers, with one to five page technical articles. Available on-line in PDF format.
http://www-03.ibm.com/servers/eserver/zseries/zos/bkserv/hot_topics.html

z/OS, OS/390 and MVS End of Support Dates
Announcement, general availability, marketing withdrawal and end of support dates and program numbers for z/OS, OS/390 and MVS/ESA.
http://www-03.ibm.com/servers/eserver/zseries/zos/support/zos_eos_dates.html

UNIX System Services
IBM resources for the full UNIX implementation built into z/OS.
http://www-03.ibm.com/servers/eserver/zseries/zos/unix/

IBM z/OS Consolidated Service Test (CST) and the Recommended Service Upgrade (RSU)
Integrated testing of an older Program Update Tape (PUT) level with hipers and PE's from a more recent PUT level for specified operating system, database and teleprocessing monitor versions.
http://www-03.ibm.com/servers/eserver/zseries/zos/servicetst/

z/OS.e
A specially priced offering of z/OS providing select z/OS function for the zSeries 800.
http://www-03.ibm.com/servers/eserver/zseries/zose/

z/OS Information Wizardry
Web-based wizards for infrequent z/OS Systems Programming tasks.
http://www-03.ibm.com/servers/eserver/zseries/zos/wizards/

DFSMS
The storage management components of z/OS, including DFSMSdfp, DFSMSdss, DFSMShsm and DFSMSrmm.
http://www-03.ibm.com/servers/storage/software/sms/

z/OS Elements and Features
A list of, and links to information on, the Base Elements included in the latest release of the z/OS operating system, and the optional Features.
http://www-03.ibm.com/servers/eserver/zseries/zos/zos_elefeat.html

DB2 for z/OS and OS/390
IBM home page for Database 2 Universal Database (DB2 UDB). Information on associated products and links to features and benefits, system requirements, library, success stories, news, downloads, events, education, services and support. DB2 is a relational database management system (DBMS).
http://www-306.ibm.com/software/data/db2/zos/

IMS
IBM home page for Information Management System (IMS). Information on the family of software with links to a library, success stories, news, events, education, services and support. IMS is a transaction processing system (IMS/TM), a hierarchical database (IMS/DB), data management tools and connectors.
http://www-306.ibm.com/software/data/ims/

IMS Glossary of Terms and Acronyms
Common technical terminology used to describe concepts within IMS/TM and IMS/DB. From IBM.
http://www-306.ibm.com/software/data/ims/shelf/glossary.htm