I didn't know the words "interprocess communication" when I first encountered Arexx and Aress ports. I came from a mostly MS-DOS and Windows 3.1 background. I hadn't used much multitasking software up to that point.
Once I grokked why Arexx ports could be cool and useful I had a terrible time trying to explain them to non-"Amiga people". I remember a friend asking to be shown the "Arexx port" on my Amiga 1200 trying to explain it was a software construct and not a physical hardware device. I'm not sure if knowing the words "interprocess communication" would have helped, but it couldn't have hurt.
I feel like I've spent a significant part of my sysadmin career making dodgy hacks to bolt-on IPC functionality to applications that don't properly expose any. Fortunately it feels like it happens a lot less today than, say, 25 years ago.