Didn't know that the "O" in Big-O actually means "order". I guess it doesn't really matter too much.
If you really wanted to get theoretical, you could also talk about the whole family, including little-O, big-omega, little-omega, etc. :)
If you really wanted to get theoretical, you could also talk about the whole family, including little-O, big-omega, little-omega, etc. :)
I think O meaning order would be a retronym.