Au

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

Music

• AU (band), an experimental pop group headed by Luke Wyland
• Au, a 2010 release by Scottish rock band from Burnham-on-Sea, named DMP (Donaldson, Moir and Paterson) - George Paterson is also Goodreads-featured writer
• 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

Universities

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