AR

AR, Ar or ar can mean:

• the letter R

Places, regions, languages

• Arabic language (ISO 639 alpha-2 language code)
• .ar, the ccTLD for Argentina
• Argentina, ISO 3166-1 alpha-2 and FIPS 10-4 digram country code
• Appenzell Outer Rhodes, Swiss canton
• Arkansas (United States postal abbreviations)

Medicine, technology, science, mathematics, economics

• Applied Relaxation, a form of behavioral therapy used for depression, anxiety, etc.
• Artificial Respiration, a cardio-respratory technique for lifesaving.
• Aortic Regurgitation, a heart valve disease
• Autoregressive, stochastic process in Econometrics
• Silver, in the field of numismatics (from the Latin Argentum)
• Analytical Reagent, such as Zinc acetate, Mandelic acid or Perchloric acid
• Argon, chemical symbol
• The AR-15, a popular Assault Rifle
• Armalite, maker of the AR-15, a popular Assault Rifle
• Anti-reflective coating, a coating on lenses that allows better light transmission through the lens.
• Artist and repertoire

Computer related

• ar is a Unix archive format and handling tool
• Activation record, a computer science term for the set of data regarding an active subroutine, stored within the stack.
• Augmented reality, an application of virtual reality in the real world
• Accelerated Reader, educational reading assessment software

Computer games

• Action Replay, Video game device
• Abandonia Reloaded, a freeware games web community.
• Alternate Reality, a Primary Racial Trait in the 4X-type computer game Stars!
• Armadillo Run, a physics-based, independently developed computer game.

Businesses, organizations, groups, publications

• Arkadium-Developer of online game software for the advergaming and casual game markets.
• Acoustic Research, a brand name of Audiovox
• Aberdeen and Rockfish Railroad, (AAR reporting mark)
• Atlantic Records
• Aerolíneas Argentinas, IATA airline designator
• The Arizona Republic, a newspaper published in Phoenix, Arizona
• Armalite, an American arms manufacturer (e.g. AR-15 or any rifle of the same pattern)
• Army Regulation, a publication in the family of field manuals, training manuals, etc.

Culture and history

• American Revolution
• Animal Rights, among animal rights activists
• Argent, the heraldic tincture of silver
• Accounts Receivable, an accounting term
• Repair Ship, U.S. Navy hull classification symbol
• the ᛅ rune of the Younger Futhark
• Ar - Ancient Armenia the Ar was the god Sun.

Fiction

• Arlesdale Railway, a fictional railway in the Railway Series by W.V. Awdry
• Alex Rider, a fictional book series, by author, Anthony Horowitz; and the character with the same name.

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.

ksh:AR (Watt ėßß datt?)

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