SA means South Australia.
"SA" is an ambiguous abbreviation. Do you mean South Africa, Saudi Arabia, or South Australia, or San Antonio, or ...
The Abbreviation for Australia is Au
According to The American Heritage Dictionary of the English Language, the abbreviation is "Aus."
The abbreviation for Tasmania is Tas.
The abbreviation for Brisbane, Australia is BRIS.
The abbreviation for Hobart, Australia is HOB.
AUT. (AUS stands for Australia.) The two letter abbreviation is AT (Australia is AU).
The abbreviation for South is simply "S."
The abbreviation for New South Wales is NSW.
The abbreviation of South in a compass, for example, is simply the letter "S".
The abbreviation for Western Australia is WA.