Try explaining /usr to a kid these days. "That obviously means Users, so that's where the home directories are, right?" "Well, no. And it actually means Unix

Try explaining /usr to a kid these days. "That obviously means Users, so that's where the home directories are, right?" "Well, no. And it actually means Unix System Resources" (but historically it was in fact "user", just not in that sense) I'm sure we'll eventually bacronym C: as well.