MMOG = Massively Multiplayer Online Game
MMORPG = Massively Multiplayer Online Role Playing Game
aber für was das AAA stehen soll, hab ich keine Ahnung
edit:
das hab ich grad gefunden
AAA
This refers to a game of the highest quality. IDG defines AAA titles as those ranking among the top 5 titles based on unit sales of the year.
quelle: http://www.gamespot.com/pages/forums...ic_id=25087695