Editing AR

{{Wiktionary|AR|Ar|ar|Appendix:Variations of "ar"}}

'''AR''', '''Ar''', or '''A&R''' may refer to:

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==Arts, entertainment, and media==
<!--Do not add entries that are not commonly known by these letters; see WP:DABABBREV -->
===Music===
* [[Artists and repertoire]]
* [[AR (EP)|''AR'' (EP)]], the debut EP by Addison Rae

===Periodicals===
* ''[[Absolute Return + Alpha]]'', a hedge fund publication
*''[[The Adelaide Review]]'', an Australian arts magazine
* [[American Renaissance (magazine)|''American Renaissance'' (magazine)]], a white nationalist magazine and website
* ''[[Architectural Review]]'', a British architectural journal
* ''[[Armeerundschau]]'', a magazine of the East German army

===Other media===
* Ar, city on the fictional planet [[Gor]]
* [[A.r. group]], an avant-garde art group 
* [[Alternate reality (disambiguation)]], various fictional concepts

==Business==
* [[Accounts receivable]], abbreviated as AR or A/R
* [[Acoustic Research]], an American audio electronics manufacturer
* [[Aerojet Rocketdyne]], an American aerospace and defense manufacturer
* [[Aerolíneas Argentinas]] (IATA airline code AR)
* [[AtkinsRéalis]], Canadian engineering company
* Some [[Alfa Romeo]] car models, e.g. AR51
* [[Toyota AR engine]]

==Language==
* ''Ar'', the Latin letter [[R]] when spelled out
* [[Ar (cuneiform)]], a cuneiform combined sign
* [[Arabic]], by ISO 639-1 language code

==Science and technology==
===Computing===
* [[Accelerated Reader]], educational reading assessment software
* [[Adaptive routing]], in networking
* [[Adobe Aero]], an Adobe software
* [[ar (Unix)]], a Unix archive format and handling tool
* [[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
* [[Autosomal recessive inheritance]]

===Mathematics===
* ar-, a prefix of [[inverse hyperbolic functions#Notation|inverse hyperbolic functions]]
* [[Autoregressive model]], concerning random processes in statistics

===Physics, chemistry and engineering===
* [[Anti-reflective]], coating of lenses
* [[Aqua regia]], a chemical mixture
* [[Archimedes number]] in fluid dynamics
* [[Argon]] (Ar), a chemical element
* [[Aryl group]], in organic chemistry
* [[Aspect ratio (aeronautics)]], of a wing
* [[Relative atomic mass]] (''A''<sub>r</sub>), the ratio of the average mass of atoms of an element

==Military and weapons==
* A US Navy hull classification symbol: [[List of auxiliaries of the United States Navy#Repair ships (AR)|Repair ship (AR)]]
* [[Armalite Rifle]]
** [[AR-15–style rifle]], rifles based on ArmaLite's AR-15
* [[Army Reserve (Ireland)]], the land component of the Irish Reserve Defence Forces (RDF)

==Places==
* [[Ar (city)]], in ancient Moab
* [[Appenzell Ausserrhoden]], 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
* [[Armstrong–Ringsted Community School District]], Iowa, United States
* [[Arunachal Pradesh]], a state of India

==Politics and ethics==
* [[Affirmative Repositioning]], a political movement in Namibia
* [[Animal rights]], a philosophy
* [[Animal rights movement]], a social movement advocating for other animals
* [[Antipodean Resistance]], an Australian neo-Nazi group

==Other uses==
* 🜇 or AR, a [[List of numismatic abbreviations|numismatic abbreviation]] for "silver"
* [[Argent]], the heraldic tincture of silver
* [[Assistant referee (association football)]]
* [[Auto rickshaw]], a motorized three-wheeled vehicle common in South Asia
* [[Avis de réception]], postal advice or acknowledgement of receipt

{{Disambiguation}}