Au, AU, au or a.u. may refer to:

Science and technology

Computing

  • .au, the internet country code for Australia
  • Au file format, Sun Microsystems' audio format
  • Audio Units, a system level plug-in architecture from Apple Computer
  • Adobe Audition, a sound editor program
  • Windows Update or Automatic Updates, in Microsoft Windows
  • Windows 10 Anniversary Update, of August 2016a

Physics and chemistry

  • Gold, chemical symbol Au
  • Absorbance unit, a reporting unit in spectroscopy
  • Atomic units, a system of units convenient for atomic physics and other fields
  • Ångström unit, a unit of length equal to 10−10 m or 0.1 nanometre.
  • Astronomical unit, a unit of length used in planetary systems astronomy
  • Arbitrary unit, a placeholder unit for when the actual value of a measurement is unknown or unimportant

Arts and entertainment

Music

  • AU (band), an experimental pop group headed by Luke Wyland
  • Au, a 2010 release by Scottish rock band Donaldson, Moir and Paterson
  • Au a track on Some Time in New York City by an album by John Lennon & Yoko Ono and Elephant's Memory

Magazines

  • Alternative Ulster, a Northern Irish music magazine, now called AU
  • A&U: America's AIDS Magazine, sponsor of the Christopher Hewitt Award

Other media

  • Alternative universe (fan fiction), fiction by fan authors that deliberately alters facts of the canonical universe written about.
  • Au Co, a fairy in Vietnamese mythology
  • Age of Ultron, a 2013 series published by Marvel Comics
  • A.U, a Chinese media franchise and brand

Organizations

  • au (mobile phone company), a mobile phone operator in Japan
  • AU Small Finance Bank in India
  • African Union, a continental union
  • Americans United for Separation of Church and State
  • Athletic Union, the union of sports clubs in a British university
  • Austral Líneas Aéreas (IATA code AU)
  • Auxiliary Units, specially trained, highly secret units created by the United Kingdom government during the Second World War
  • AGROunia, an agrarian-socialist political party in Poland

Universities

Asia

  • Ajou University in Suwon, Gyeonggi, South Korea
  • Abasyn University in Peshawar, Khyber Pakhtunkhwa, Pakistan
  • Andhra University in Visakhapatnam, AP, India
  • Anhui University in Hefei, Anhui, China
  • Aletheia University in New Taipei City, Taiwan
  • Allahabad University in Allahabad, Uttar Pradesh, India
  • Arellano University in Philippines
  • Assumption University (Thailand) in Thailand
  • Abhilashi University in Himachal Pradesh, India
  • Adesh University in Bathinda, Punjab, India.

Europe

  • Aarhus University in Aarhus, Denmark
  • Aberystwyth University in Aberystwyth, Wales, United Kingdom
  • Akademia Umiejętności in Kraków, Poland
  • Arden University in Coventry, England

Oceania

  • Adelaide University in South Australia, Australia
  • Auckland University in New Zealand

North America

  • Adelphi University in Garden City, New York
  • Alfred University in Alfred, New York
  • Algoma University in Sault Ste. Marie, Ontario, Canada
  • American University in Washington, D.C.
  • Anderson University (Indiana) in Anderson, Indiana
  • Anderson University (South Carolina) in Anderson, South Carolina
  • Andrews University in Berrien Springs, Michigan
  • Antioch University in Culver City, California
  • Apollos University in Huntington Beach, California
  • Arcadia University in Glenside, Pennsylvania
  • Argosy University in Alameda, California
  • Arizona University in Tucson, Arizona
  • Ashland University in Ashland, Ohio
  • Athabasca University in Athabasca, Alberta, Canada
  • Auburn University in Auburn, Alabama
  • Augsburg University in Minneapolis, Minnesota
  • Augusta University in Augusta, Georgia
  • Aurora University in Aurora, Illinois

Other

  • Air University (disambiguation), various Air Force universities

Places

  • Aue (toponymy), a frequent element in Germanic toponymy
  • Australia (ISO 3166 country code)
  • Au, Guinea, Kankan Region

Austria

  • Austria (obsolete NATO, FIPS, and LOC MARC two-letter country code)
  • Au, Vorarlberg, Bregenz, Austria
  • Au am Leithaberge, Austria
  • Au im Bregenzerwald, Austria

Germany

  • Au (Munich), Munich, Germany
  • Au (Schwarzwald), Baden-Württemberg, Germany
  • Au (squat), a building and cultural center in Frankfurt, Germany
  • Au am Rhein, Germany
  • Au in der Hallertau, Germany

Switzerland

  • Au, St. Gallen
  • Au, Zürich
  • Au peninsula
  • Schloss Au, a château in Wädenswil

Vehicles

  • Ford Falcon (AU), a family car made in Australia
  • Vought AU, a post-World War II US Marine Corps variant of the F4U Corsair aircraft

Other uses

  • Alopecia universalis, a medical condition involving the loss of all body hair
  • Aú, a cartwheel in the Brazilian martial art of Capoeira
  • Au (surname), a Chinese family name
  • Au language
  • Ab urbe condita (sometimes abbreviated as a.u.), Latin for "from the founding of the City" (Rome)
  • a'u, the Hawaiian name for the Pacific blue marlin