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ISO 3166-2:AU is the entry for Australia in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.
ISO 3166-1 alpha-2 – two-letter country codes which are also used to create the ISO 3166-2 country subdivision codes and the Internet country code top-level domains. ISO 3166-1 alpha-3 – three-letter country codes which may allow a better visual association between the codes and the country names than the 3166-1 alpha-2 codes.
The format of the ISO 3166-2 codes is different for each country. The codes may be alphabetic, numeric, or alphanumeric, and they may also be of constant or variable length. The following is a table of the ISO 3166-2 codes of each country (those with codes defined), grouped by their format: [citation needed]
The name Australia was specifically applied to the continent for the first time in 1794. [5] The name Australia (pronounced / ə ˈ s t r eɪ l i ə / in Australian English [6]) is derived from the Latin australis, meaning ' southern ', and specifically from the hypothetical Terra Australis postulated in pre-modern geography.
ISO 3166-1 alpha-2 – two-letter country codes which are the most widely used of the three, and used most prominently for the Internet's country code top-level domains (with a few exceptions). ISO 3166-1 alpha-3 – three-letter country codes which allow a better visual association between the codes and the country names than the alpha-2 codes.
Australia, officially the Commonwealth of Australia, [17] is a country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands. [18] Australia has a total area of 7,688,287 km 2 (2,968,464 sq mi), making it the sixth-largest country in the world and the largest in Oceania.
The two-letter codes are used as the basis for other codes and applications, for example, for ISO 4217 currency codes; with deviations, for country code top-level domain names (ccTLDs) on the Internet: list of Internet TLDs. Other applications are defined in ISO 3166-1 alpha-2.
The ISO 3166/MA updates ISO 3166-1 when necessary. A country is normally assigned new ISO 3166-1 codes if it changes its name or its territorial boundaries. In general, new alphabetic codes are assigned if a country changes a significant part of its name, while a new numeric code is assigned if a country changes its territorial boundaries.