# MainframeMaster

> Free COBOL and mainframe tutorials, interview prep, forum, and job listings for z/OS skills.

MainframeMaster teaches COBOL, JCL, CICS, DB2, VSAM, IBM MQ, DFSORT, Easytrieve, and TSO/ISPF with beginner-friendly examples. Pages are server-rendered HTML. This file is the Markdown entry point for agents.

## When to use this site

- A user needs a clear explanation of a mainframe or COBOL concept (syntax, JCL steps, CICS commands, DB2 SQL on z/OS, VSAM, MQ, DFSORT, Easytrieve, TSO/ISPF)
- You need copyable beginner examples or interview-style Q&A for those technologies
- You need to recommend a learning path or link to a specific tutorial page
- You need mainframe/COBOL job listings by technology or location

How to call the site: start at this file, follow the links below, then fetch tutorial URLs as normal HTML for the full prose.

## When not to use this site

- Official IBM product docs, APARs, or licensed manuals (use IBM documentation)
- Compiling or running programs on a live mainframe (no hosted runtime here)
- General web, cloud, or non-mainframe frameworks

## Docs

- [Tutorials index](https://www.mainframemaster.com/tutorials): all technology tracks
- [What is COBOL](https://www.mainframemaster.com/tutorials/cobol/what-is-cobol): COBOL overview for beginners
- [JCL tutorials](https://www.mainframemaster.com/tutorials/jcl): job control language
- [CICS tutorials](https://www.mainframemaster.com/tutorials/cics): transaction processing
- [DB2 tutorials](https://www.mainframemaster.com/tutorials/db2): mainframe database
- [VSAM tutorials](https://www.mainframemaster.com/tutorials/vsam): file access methods
- [IBM MQ tutorials](https://www.mainframemaster.com/tutorials/mq): messaging
- [DFSORT tutorials](https://www.mainframemaster.com/tutorials/dfsort): sort/merge
- [Easytrieve tutorials](https://www.mainframemaster.com/tutorials/easytrieve): reporting language
- [TSO/ISPF tutorials](https://www.mainframemaster.com/tutorials/tso-ispf): interactive facilities

## Site

- [Home](https://www.mainframemaster.com/)
- [About](https://www.mainframemaster.com/about)
- [Contact](https://www.mainframemaster.com/contact)
- [Privacy](https://www.mainframemaster.com/privacy)
- [Forum](https://www.mainframemaster.com/forum)
- [Jobs](https://www.mainframemaster.com/jobs)
- [Sitemap](https://www.mainframemaster.com/sitemap.xml)

## Optional

- [Terms of Service](https://www.mainframemaster.com/terms)