Au, AU, au or a.u. may refer to:
Science and technology
Computing
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.au, the internet country code for Australia
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Au file format, Sun Microsystems' audio format
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Audio Units, a system level plug-in architecture from Apple Computer
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Adobe Audition, a sound editor program
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Windows Update or Automatic Updates, in Microsoft Windows
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Windows 10 Anniversary Update, of August 2016a
Physics and chemistry
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Gold, chemical symbol Au
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Absorbance unit, a reporting unit in spectroscopy
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Atomic units, a system of units convenient for atomic physics and other fields
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Ångström unit, a unit of length equal to 10−10 m or 0.1 nanometre.
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Astronomical unit, a unit of length used in planetary systems astronomy
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Arbitrary unit, a placeholder unit for when the actual value of a measurement is unknown or unimportant
Arts and entertainment
Music
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AU (band), an experimental pop group headed by Luke Wyland
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Au, a 2010 release by Scottish rock band Donaldson, Moir and Paterson
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Au a track on Some Time in New York City by an album by John Lennon & Yoko Ono and Elephant's Memory
Magazines
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Alternative Ulster, a Northern Irish music magazine, now called AU
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A&U: America's AIDS Magazine, sponsor of the Christopher Hewitt Award
Other media
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Alternative universe (fan fiction), fiction by fan authors that deliberately alters facts of the canonical universe written about.
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Au Co, a fairy in Vietnamese mythology
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Age of Ultron, a 2013 series published by Marvel Comics
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A.U, a Chinese media franchise and brand
Organizations
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au (mobile phone company), a mobile phone operator in Japan
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AU Small Finance Bank in India
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African Union, a continental union
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Americans United for Separation of Church and State
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Athletic Union, the union of sports clubs in a British university
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Austral Líneas Aéreas (IATA code AU)
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Auxiliary Units, specially trained, highly secret units created by the United Kingdom government during the Second World War
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AGROunia, an agrarian-socialist political party in Poland
Universities
Asia
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Ajou University in Suwon, Gyeonggi, South Korea
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Abasyn University in Peshawar, Khyber Pakhtunkhwa, Pakistan
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Andhra University in Visakhapatnam, AP, India
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Anhui University in Hefei, Anhui, China
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Aletheia University in New Taipei City, Taiwan
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Allahabad University in Allahabad, Uttar Pradesh, India
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Arellano University in Philippines
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Assumption University (Thailand) in Thailand
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Abhilashi University in Himachal Pradesh, India
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Adesh University in Bathinda, Punjab, India.
Europe
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Aarhus University in Aarhus, Denmark
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Aberystwyth University in Aberystwyth, Wales, United Kingdom
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Akademia Umiejętności in Kraków, Poland
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Arden University in Coventry, England
Oceania
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Adelaide University in South Australia, Australia
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Auckland University in New Zealand
North America
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Adelphi University in Garden City, New York
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Alfred University in Alfred, New York
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Algoma University in Sault Ste. Marie, Ontario, Canada
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American University in Washington, D.C.
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Anaheim University in Anaheim, California
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Anderson University (Indiana) in Anderson, Indiana
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Anderson University (South Carolina) in Anderson, South Carolina
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Andrews University in Berrien Springs, Michigan
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Antioch University in Culver City, California
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Apollos University in Huntington Beach, California
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Arcadia University in Glenside, Pennsylvania
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Argosy University in Alameda, California
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Arizona University in Tucson, Arizona
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Ashland University in Ashland, Ohio
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Athabasca University in Athabasca, Alberta, Canada
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Auburn University in Auburn, Alabama
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Augsburg University in Minneapolis, Minnesota
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Augusta University in Augusta, Georgia
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Aurora University in Aurora, Illinois
Other
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Air University (disambiguation), various Air Force universities
Places
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Aue (toponymy), a frequent element in Germanic toponymy
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Australia (ISO 3166 country code)
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Au, Guinea, Kankan Region
Austria
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Austria (obsolete NATO, FIPS, and LOC MARC two-letter country code)
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Au, Vorarlberg, Bregenz, Austria
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Au am Leithaberge, Austria
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Au im Bregenzerwald, Austria
Germany
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Au (Munich), Munich, Germany
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Au (Schwarzwald), Baden-Württemberg, Germany
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Au (squat), a building and cultural center in Frankfurt, Germany
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Au am Rhein, Germany
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Au in der Hallertau, Germany
Switzerland
Vehicles
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Ford Falcon (AU), a family car made in Australia
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Vought AU, a post-World War II US Marine Corps variant of the F4U Corsair aircraft
Other uses
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Aú, a cartwheel in the Brazilian martial art of Capoeira
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Au (surname), a Chinese family name
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Au language
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Ab urbe condita (sometimes abbreviated as a.u.), Latin for "from the founding of the City" (Rome)
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a'u, the Hawaiian name for the Pacific blue marlin
