Au, AU or au may refer to:
Australia (/əˈstreɪliə/, /ɒ-/, /-ljə/), 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 (/ˈɒstriə, ˈɔː-/; 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.
Auschwitz concentration camp (German: Konzentrationslager Auschwitz, also KZ Auschwitz [kɔntsɛntʁaˈtsi̯oːnsˌlaːɡɐ ˈʔaʊʃvɪts]) was a network of German Nazi concentration camps and extermination camps built and operated by the Third Reich in Polish areas annexed by Nazi Germany during World War II.
Audrey Hepburn (/ˈɔːdri ˈhɛpˌbɜːrn/; born Audrey Kathleen Ruston; 4 May 1929 – 20 January 1993) was a British actress, model, dancer and humanitarian.
Austria-Hungary, often referred to as the Austro-Hungarian Empire in English-language sources, was a constitutional union of the Austrian Empire (the Kingdoms and lands represented in the Imperial Council, or Cisleithania) and the Kingdom of Hungary (Lands of the Crown of Saint Stephen or Transleithania) that existed from 1867 to 1918, when it collapsed as a result of defeat in World War I.
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 Emperor, controlling the Roman Empire from 27 BC until his death in AD 14.
The automatic calculation of particle interaction or decay is part of the computational particle physics branch.
Augustine of Hippo (/ɔːˈɡʌstᵻn/, /əˈɡʌstᵻn/, or /ˈɔːɡʌstᵻn/; Latin: Aurelius Augustinus Hipponensis; 13 November 354 – 28 August 430), also known as Saint Augustine, Saint Austin, (/ˈɔːstᵻn/ or /ˈɑːstᵻn/) Blessed Augustine, and the Doctor of Grace (Latin: Doctor gratiae), was an early Christian theologian and philosopher whose writings influenced the development of Western Christianity and Western philosophy.