Learn JCL-TSO-SCRIPTS with Real Code Examples
Updated Nov 27, 2025
Learning Path
Learn JCL basics (JOB, EXEC, DD)
Understand datasets and utilities
Master TSO and ISPF navigation
Learn REXX scripting
Build advanced batch workflows
Skill Improvement Plan
Week 1: JCL syntax basics
Week 2: Dataset management
Week 3: REXX scripting
Week 4: Utilities like IDCAMS, SORT
Week 5: Build production-grade batch cycles
Interview Questions
Explain JCL JOB, EXEC, and DD statements.
How do you handle return codes in JCL?
Difference between REXX and CLIST?
How to debug a failing JCL step?
What is a PROC in JCL?
Cheat Sheet
JOB - defines the job
EXEC - runs a program
DD - dataset declaration
SDSF - monitor jobs
REXX - scripting language
Books
MVS JCL Reference Guide
TSO/ISPF Mastery
REXX Programming on IBM Mainframes
JCL Utilities Handbook
z/OS Essentials
Tutorials
Intro to JCL
Learning TSO/ISPF
REXX scripting basics
Mainframe utilities overview
Batch job debugging fundamentals
Official Docs
IBM JCL Reference
IBM TSO/E Command Reference
IBM REXX Reference for z/OS
Community Links
IBM Mainframe forum
StackOverflow JCL/REXX tags
Mainframe Developer Slack
Reddit r/mainframe
Legacy modernization groups
Community Support
IBM documentation
Mainframe developer forums
IBM community groups
StackOverflow REXX/JCL tags
Legacy modernization communities