Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands.
Country codes are short alphabetic or numeric geographical codes (geocodes) developed to represent countries and dependent areas, for use in data processing and communications.
A country code top-level domain (ccTLD) is an Internet top-level domain generally used or reserved for a country, sovereign state, or dependent territory identified with a country code.
The Territory of Heard Island and McDonald IslandsCIA World Factbook. Accessed 4 January 2009.
The Indian Ocean is the third largest of the world's oceanic divisions, covering (approximately 20% of the water on the Earth's surface).
The Internet is the global system of interconnected computer networks that use the Internet protocol suite (TCP/IP) to link devices worldwide.
A top-level domain (TLD) is one of the domains at the highest level in the hierarchical Domain Name System of the Internet.
.aq is the Internet country code top-level domain (ccTLD) for Antarctica (although not a country).