Not forgetting "Sergeant Mac" the chinagraph wielder who was the only man at Finningley mid 1970s who had the least idea regarding Ground School programming, and ran the display boards with a cheerful despotism.
"Mac, I need to bin my lecture mid afternoon!"
"Today?"
"No, tomorrow"
"Tomorrow is a piece of piss, today could have been managed by, lets see, moving A to X, B to Y, phoning so-and- so, .................
and can you you do it first thing the day after?"
This before flow diagrams, PCs, and the rest. Timetabling on the hoof.
But after chinagraph.