Number of yards per pound. To figure this out measure the number of yards in a skein of yarn, then weigh it. If weighing in grams calculate the number of ypp like so: # of yards ÷ weight in grams x 454 (because there are 454 grams in a pound).
that’s a toss up… I live in the Wash DC area and the acronyms that get thrown around make you think everyone speaks a foreign language! there’s the military, the feds, the locals, geek-speak galore…