Au, AU or au may refer to:
Australia (, , ), officially the Commonwealth of Australia, is a country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands.
Automation or automatic control, is the use of various control systems for operating equipment such as machinery, processes in factories, boilers and heat treating ovens, switching on telephone networks, steering and stabilization of ships, aircraft and other applications and vehicles with minimal or reduced human intervention.
Austria (; German: Österreich [ˈøːstɐˌʁaɪç]), officially the Republic of Austria (German: Republik Österreich, listen ), is a federal republic and a landlocked country of over 8.7 million people in Central Europe.
Augustus (Latin: Imperātor Caesar Dīvī Fīlius Augustus; 23 September 63 BC – 19 August 14 AD) was the founder of the Roman Principate and considered the first Roman emperor, controlling the Roman Empire from 27 BC until his death in AD 14. He was born Gaius Octavius into an old and wealthy equestrian branch of the plebeian gens Octavia.
Austin () is the capital of the U.S. state of Texas and the seat of Travis County, although portions extend into Hays and Williamson counties.
The Australian national soccer team represents Australia in international men's soccer. Officially nicknamed the Socceroos, the team is controlled by the governing body for soccer in Australia, Football Federation Australia (FFA), which is currently a member of the Asian Football Confederation (AFC) and the regional ASEAN Football Federation (AFF) since leaving the Oceania Football Confederation (OFC) in 2006.