A thread ongoing on Best Organisation Names reminds me of my delight in appropriate acronyms {"acronym" used here in the true & correct sense, not just of an abbreviation, but of one pronounceable as a word in its own right, like NAAFI or NATO}.
Two which come to mind are MADD {Mothers Against Drunk Driving} and STOPP {Society of Teachers Opposed to Physical Punishment, from the days way back when there was still corporal punishment in some British schools}.