"Who remembers Backus-Naur ?"
I do! Back in the early-1980s, working at the in-house consultancy arm of a multinational, I was on-site doing some tedious task when I was joined by a colleague from our Dutch office. He had even less patience than me, so less than 30 minutes in, he resorted to giving me a formal lecture on Backus-Naur notation for the rest of the morning (and returned to Rotterdam in the afternoon). (When the main Board closed us down the following year, he returned to the University of Leiden. Thank you, Joss - I'll never forget BNF.)