AR
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Look up AR, Ar, ar, or Appendix:Variations of "ar" in Wiktionary, the free dictionary. |
AR, Ar, or A&R may refer to:
Arts, entertainment, and media
Music
Periodicals
- Absolute Return + Alpha, a hedge fund publication
- American Renaissance (magazine), a white nationalist magazine and website
- Architectural Review
- Armeerundschau, a magazine of the East German army
Other media
- Ar, city on the fictional planet Gor
- a.r. group of Polish artists and poets, including Katarzyna Kobro
- Alternate reality (disambiguation), various fictional concepts
Businesses
- A & R Sales, a defunct firearms manufacturer
- Aerolíneas Argentinas (IATA airline code AR)
- Some Alfa Romeo car models, e.g. AR51
- Acoustic Research, an American audio electronics manufacturer
- Toyota AR engine
Firearms
Language
- Ár, written "ᛅ", a rune of the Younger Futhark alphabet
- Arabic language (ISO 639 alpha-2 language code AR)
Mathematics, science, and technology
Computing
- ar (Unix), a Unix archive format and handling tool
- Accelerated Reader, educational reading assessment software
- Augmented reality, an application of virtual reality in the real world
Biology and medicine
- Androgen receptor, a nuclear hormone receptor
- Aortic regurgitation, a heart valve disease
Mathematics
- Prefix of inverse hyperbolic functions, e.g. arsinh id the inverse of sinh
- Autoregressive model, concerning random processes in statistics
Physics and chemistry
- Archimedes number in fluid dynamics
- Argon, symbol Ar
- Placeholder for the Aryl group in organic chemistry
- Ar, Relative atomic mass of a chemical element
Other uses in mathematics, science, and technology
- Anti-reflective, coating of lenses
- Aspect ratio (aeronautics), of a wing
Military
- US Navy hull classification symbol for repair ships
- Army Reserve (Ireland), the land component of the Irish Reserve Defence Forces (RDF)
Places
- Ar (city), in ancient Moab
- Appenzell Outer Rhodes, Switzerland
- Province of Arezzo, Italy, vehicle registration code
- Argentina (ISO 3166-1 alpha-2 country code)
- .ar, the country code Top Level Domain for Argentina
- Arkansas, United States
Other uses
- Argent, the heraldic tincture of silver
- Assistant referee (association football)
- Avis de réception, postal advice or acknowledgement of receipt
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