JCL

Aviation fuel is set to lead exports with a 20% increase, due to faster expansion in domestic production versus declining demand growth, said Wang Yanting, Shandong-based analyst at consultancy JCL Network Technology.

Dev and ops started to separate in the ’60s, when programmer/analysts dumped boxes of punch cards into readers, and “computer operators” behind a glass wall scurried around mounting tapes in response to JCL.

"Yeah, I looked for a list of 360 mnemonics to post as a joke, but I hit EOF pretty fast; all the library had was a JCL manual."

Anything that requires heavy wizardry or black art to parse: core dumps, JCL commands, APL, or code in a language you haven't a clue how to read.

JCL has a very fascist syntax, and some versions will, for example, barf if two spaces appear where it expects one.