Au, AU or au might refer to:

Arts and entertainment

Music

Other media

Businesses and organizations

Places

Austria

Germany

Switzerland

Other places

Science and technology

Computing

Physics and chemistry

  • Gold, a chemical element with the symbol Au
  • Absorbance unit, a reporting unit in spectroscopy
  • Atomic units, a system of units convenient for atomic physics and additional fields

Vehicles

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

Other uses in science and technology

  • a'u, the Hawaiian name for the Pacific blue marlin
  • Astronomical unit, an approximation for the average distance between the Earth and the Sun
  • Arbitrary unit, a relative placeholder unit for when the actual value of a measurement is unknown or unimportant

Universities

Asia

Europe

Oceania

North America

Other uses

  • , a cartwheel in the Brazilian martial art of Capoeira
  • Au (surname), a Chinese family name
  • Ab urbe condita (sometimes abbreviated as a.u.), Latin for "from the founding of the City" (Rome)