Nmeumonic device that's how you spell it
, I was going to put that but did not know the spelling and also figured that not everyone knows what that means. I know, Please excuse my dear Aunt Sally (or Purple elephants may dance at sunset), aka the order of mathmatical operations, Parenthesis, Exponent, Multiplication/Division, Addition/Subtraction, we also liked calling it PEMDAS since it sounds funny
. Then there was HOMES; Huron, Ontario, Michigan, Erie, and Superior. I can't remember the one for Kingdom et al., been so long, my area of science doesn't really believe in it either since it is rather archaic and attempts to modernise it have not been too successful.