[jsymolon]

It's not assembler that'll get ya, it's the JCL.

Past Technical Lead, "Don't bother w/ creating the JCL, copy it from <this job>"

[euroderf]

Bad memories of JCL. An IBM mainframe at college, late 70s, and only a few guys that hung around the keypunch room knew the secret incantations. SYSIN DD *

[pinewurst]

Airline reservation systems didn’t use JCL (something from OS, MVS, etc). They used a special transactional OS called ACP/TPF instead.