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Meanings and definitions for AO
What does AO stand for? What does AO mean?
- Adults Only, an entertainment rating
- AO Music (AOmusic), a world-music fusion group consisting of Jay Oliver, Miriam Stockley and others
- Eureka Seven: AO, Japanese mecha anime television series
- Lord Ao, a fictional deity in the Dungeons & Dragons universe
- Annoying Orange, an American comedy web series
- AO (originally American Optical Company) eyeglass lenses, a brand now merged with Carl Zeiss Vision
- AO Foundation (originally Arbeitsgemeinschaft für Osteosynthesefragen), a non-profit organisation dedicated to the treatment of trauma and disorders of the musculoskeletal system
- AO World, a UK retailer of household appliances trading under the brand name ao.com
- Aktsionernoye Obschestvo or Aktsionernoye Obshchestvo (акционерное общество), a type of Russian corporate entity; see open joint-stock company
- Athletics Ontario, formally Ontario Track and Field Association (OTAF)
- Australian Airlines (IATA code AO)
- Administrative Office of the United States Courts
- Angola (ISO code and NATO country code AO)
- Autonomous oblast, type of Russian administrative division
- Autonomous okrug, type of Russian administrative division
- NSDAP/AO, Foreign Organization branch of the Nazi Party
- Officer of the Order of Australia, postnominal AO
- Area of operations, a U.S. military term
- AO, a U.S. Navy hull classification symbol for an oiler
- AO-, the prefix for several firearms
- Aviation Ordnanceman, a United States Navy occupational rating
- Alpha and Omega (abbreviation)
- Ao (mythology), a deity in Māori mythology
- Ao (turtle), a creature in Chinese mythology
- Ao, a type of Easter Island wood carving
- .ao, top-level Internet domain code for Angola
- Adaptive optics, an astronomical imaging technology
- Ambient occlusion, a shading method in computer graphics
- AMSAT-OSCAR, a satellite naming convention
- Applied Optics, scientific journal published by the Optical Society of America (OSA)
- Arctic oscillation, a climate pattern
- Atomic orbital, in physics and chemistry
- Ao (surname) (敖), a Chinese surname
- Ou (surname) (区/區 and 欧/歐), romanized as Ao in Cantonese
- Aaron Owens (born 1976), American streetball player
- Alphabetically ordered
- Ao (color)
- Ao languages
- Ao Naga, an Indian ethnic group
- ao or außerordentlicher, meaning extraordinary professor (academic rank in Germany)
- Australian Open, an annual tennis tournament in Melbourne, Australia
- Alpha & Omega (band), a British dub/reggae duo
- Alpha & Omega Recording, the San Rafael, California recording studio of American music producer Sandy Pearlman
- Alpha and Omega (Bizzy Bone album), 2004
- Alpha and Omega (Tonus Peregrinus album), 2008
- Alpha Omega (Cro-Mags album), 1992
- Alpha Omega (Cheek album), 2015
- "Alpha Omega", a bootleg compilation of tracks by The Beatles which prompted the release of the official 1962–1966 and 1967–1970 compilations
- "Alpha and Omega", a track off of Boards of Canada's 2002 album Geogaddi
- "Alpha and Omega", a track off of Architects 2012 album Daybreaker
- "Alpha Omega", a track off of Karnivool's 2013 album Asymmetry
- Alpha and omega, the first and the last letters in the Greek alphabet
- Alpha and Omega (Harrison), a 1915 collection of essays, lectures, and letters written by Jane Ellen Harrison
- Alpha and Omega, California gold rush towns, now honored as the historical landmark of Alpha Hydraulic Diggings
- Alpha and Omega (film series), a series of eight animated films produced by Crest Animation Productions
Alpha and Omega (film), a 2010 animated comedy-drama film and a series of direct-to-DVD videos
- "Alpha and Omega" (Supernatural), a 2016 episode of Supernatural
- Alpha and Omega (radio plays), a pair of radio dramas by Mike Walker first aired by the BBC World Service in 2001 and 2002
- Alpha and Omega, a 2007 novella by Patricia Briggs and the name for a series of subsequent novels
- Alpha and Omega, another name for the word game Word chain
- Alpha & Omega (book), a 2003 book by Charles Seife
- Alpha et Omega, an occult order initially named the Hermetic Order of the Golden Dawn
- Alpha Omega (board game), a 1977 board wargame published by Battleline Publications
- Alpha Omega (role-playing game), developed by Mind Storm Labs
- Alpha Omega (fraternity), a professional Jewish dental fraternity
- Pokémon Omega Ruby and Alpha Sapphire, remakes of the Pokémon Japanese role-playing games Pokémon Ruby and Sapphire
- Alpha and Omega, the doomsday bomb in Beneath the Planet of the Apes
Alpha-Omega, a military faction in War for the Planet of the Apes
- Omegaverse, a literary subgenre focusing on dynamics between characters labeled Alphas, Betas, and Omegas popularized by slash fiction
- 101 A0 and 103 A0, two versions of the German Heinkel Tourist moped
- A0 paper size, an international ISO 216 standard paper size (841 × 1189 mm), which results in an area very close to 1 m²
- A0 highway (Zimbabwe), a highway which orbits Zimbabwe
- A0, the lowest A (musical note) note on a standard piano
- A0, a climbing grade
- A00, Irregular chess openings code in the Encyclopaedia of Chess Openings
- A-0 Geyser, a geyser in Yellowstone National Park
- A-0 System, an early compiler related tool developed for electronic computers
- L'Avion, IATA airline designator for the French airline
- Characters of type A0, an older term for algebraic Hecke characters
- a0, the accepted mathematical symbol for the Bohr radius
- Haplogroup A00 and A0; see Y-chromosomal Adam and Haplogroup A (Y-DNA)
- A0, a subdivision in stellar classification
- A0, sometimes written as 0xA0, is the hexadecimal representation of non-breaking space in various character encoding standards
- A0 road (Sri Lanka), an A-Grade road in Sri Lanka
- A-0, a 1943 Pre-production model of the German Walter HWK 509 liquid-fuel bipropellant rocket engine
- A-0, a 1938 variant of the German Siebel Si 204 transport and trainer aircraft
- He 177 A-0, a pre-production series of the 1942 German Heinkel He 177 heavy bomber
- Hs 126A-0, a variant of the 1937 German Henschel Hs 126 reconnaissance aircraft
- Ju 87 A-0, a variant of the 1936 German Junkers Ju 87 dive bomber aircraft
- Me 210A-0, a pre-production variant of the 1943 German Messerschmitt Me 210 heavy fighter aircraft
- Isaac Peral (A-0), a Spanish submarine
- Account Of
- Analog Output
- Angola, (024) ISO 2-letter country code
- Anoxic Zone, A/O
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