The page contains links to articles and coding samples used predominantly, but not exclusively between 2003 and the present time. The main operating systems were z/OS 1.3 through to z/OS 2.5.

Any z/VSE topics will relate to z.VSE 4.3 as that was the last system used.

The first use of z/OS type JCL was in late 1966, with DOS (later z/VSE) following in 1968.

z/OS JCL Topics

Block Size BLKSIZE described
Data Control Block (DCB) Open Merge non-VSAM
Data Set Organization DSORG.
Define an ESDS Cluster using IDCAMS
Define an KSDS Cluster using IDCAMS
Define an RRDS Cluster using IDCAMS
Directing execution to a specific z/OS image using the SYSNAME System Symbol
Disk extents explained
Input Stream Symbolic Parameter usage
Inter Block Gaps
Is BLKSIZE optimization still relevant
Locating Procedure Libraries
Logical Record Length LRECL described
Mount a File System
Operator Commands via the Input Stream
Rationale for using the INCLUDE Statement
Some thoughts on Batch Job Design, single versus multiple steps
What are Standard Labels?
What is z/OS JCL?

z/OS JCL Topics

ZFS Creation and Cataloguing

z/VSE JCL Topics

z/VSE and z/OS JCL Comparison