See on: Wikipedia Investopedia The Australian dollar, or A$, is the official currency of the Commonwealth of Australia, including the Australian Antarctic Territory, Christmas Island, Cocos (Keeling) Islands, Heard Island and McDonald Islands and Norfolk Island, as well as the independent Pacific island states of Kiribati, Nauru and Tuvalu. It is sometimes affectionately called the "Aussie battler"; during a low period (relative to the US dollar) around 2001 and 2002 the currency was sometimes locally called the "Pacific Peso." It is subdivided into 100 cents (symbol c).
The Australian dollar (currency code AUD) has been, since 14 February, 1966, the currency of the Commonwealth of Australia, including Christmas Island, Cocos (Keeling) Islands, and Norfolk Island, as well as the independent Pacific Island states of Kiribati, Nauru and Tuvalu. It is normally abbreviated with the dollar sign $. Alternatively A$ or $A, $AU or AU$ is used to distinguish it from other dollar-denominated currencies.