Out Of Stock. As in, a retailer is selling something and they ran out of it.
Check out this deal at somewebsite! It's a total steal! Oops, it's OOS.
By Jeanne
OoS
Out of Sync. Problem that used to plague Age of Mythology's online matchmaking service, ESO, until a patch fixed it. Any one player being "out of sync" would crash the game for all players involved. Only comes up now in rare instances.
it a emoticon for a nintendo controller. the left bracket is a side, the + is the d-pad, the two - - are the select and start keys, the two o o are the B and A buttons, and the end bracket is the other side of the controller.