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The notion of waiting ages for programs to compile or assemble is mostly related to the older hardware.

I compile/assemble COBOL and IBM's assembly language on a z13 daily and it's pretty much instantaneous.

The bots just exposed that they're only running Cleverbot

Most of what I've learned has been from examples from co-workers, but I've also used the IBM knowledge center and the IBM "Redbooks".

I think the Redbook titled z/OS Basics has some JCL examples and exercises in it.

I also found this through a quick search: http://www.ibm.com/support/knowledgecenter/zosbasics/com.ibm...

IBM's High-Level Assembler and JCL mostly.

I develop mainframe software.