IBM JCL was where the truly magical incantations entered the picture. We had grad students who hung out in the punch card room and they were the go-to guys for getting your JCL sorted out. SYSIN DD *, baby!
I used to know some jcl, those were the days. It was used in a few "advanced" classes when I was an undergrad. Was that the one that had the little hello pamplet with details, or was that yellow pamplet describing sys/360 assembly.
\\GO.SYSIN DD *
DOO DAH
DOO DAH
(Checks beard color and blushes.)