# AR

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/AR
> Markdown URL: https://mediated.wiki/source/AR.md
> Source: https://en.wikipedia.org/wiki/AR
> Source revision: 1356072821
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

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

## Arts, entertainment, and media

### Music

- [Artists and repertoire](/source/Artists_and_repertoire)
- [*AR* (EP)](/source/AR_(EP)), the debut EP by Addison Rae

### Periodicals

- *[Absolute Return + Alpha](/source/Absolute_Return_%2B_Alpha)*, a hedge fund publication
- *[The Adelaide Review](/source/The_Adelaide_Review)*, an Australian arts magazine
- [*American Renaissance* (magazine)](/source/American_Renaissance_(magazine)), a white nationalist magazine and website
- *[Architectural Review](/source/Architectural_Review)*, a British architectural journal
- *[Armeerundschau](/source/Armeerundschau)*, a magazine of the East German army

### Other media

- Ar, city on the fictional planet [Gor](/source/Gor)
- [A.r. group](/source/A.r._group), an avant-garde art group

## Business

- [Accounts receivable](/source/Accounts_receivable), abbreviated as AR or A/R
- [Acoustic Research](/source/Acoustic_Research), an American audio electronics manufacturer
- [Aerojet Rocketdyne](/source/Aerojet_Rocketdyne), an American aerospace and defense manufacturer
- [Aerolíneas Argentinas](/source/Aerol%C3%ADneas_Argentinas) (IATA airline code AR)
- [AtkinsRéalis](/source/AtkinsR%C3%A9alis), Canadian engineering company
- Some [Alfa Romeo](/source/Alfa_Romeo) car models, e.g. AR51
- [Toyota AR engine](/source/Toyota_AR_engine)

## Language

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

## Science and technology

### Computing

- [Accelerated Reader](/source/Accelerated_Reader), educational reading assessment software
- [Adaptive routing](/source/Adaptive_routing), in networking
- [Adobe Aero](/source/Adobe_Aero), an Adobe software
- [ar (Unix)](/source/Ar_(Unix)), a Unix archive format and handling tool
- [Augmented reality](/source/Augmented_reality), a type of 3D human-computer interaction similar to virtual reality

### Biology and medicine

- [Androgen receptor](/source/Androgen_receptor), a nuclear hormone receptor
- [Antimicrobial resistance](/source/Antimicrobial_resistance) to drugs
- [Aortic regurgitation](/source/Aortic_regurgitation), a heart valve disease
- [Autosomal recessive inheritance](/source/Autosomal_recessive_inheritance)

### Mathematics

- ar-, a prefix of [inverse hyperbolic functions](/source/Inverse_hyperbolic_functions#Notation)
- [Autoregressive model](/source/Autoregressive_model), concerning random processes in statistics

### Physics, chemistry and engineering

- [Aqua regia](/source/Aqua_regia), a chemical mixture
- [Archimedes number](/source/Archimedes_number) in fluid dynamics
- [Argon](/source/Argon) (Ar), a chemical element
- [Aryl group](/source/Aryl_group), in organic chemistry
- [Aspect ratio (aeronautics)](/source/Aspect_ratio_(aeronautics)), of a wing
- [Relative atomic mass](/source/Relative_atomic_mass) (*A*r), the ratio of the average mass of atoms of an element
- [Anti-reflective coating](/source/Anti-reflective_coating)

## Military and weapons

- A US Navy hull classification symbol: [Repair ship (AR)](/source/List_of_auxiliaries_of_the_United_States_Navy#Repair_ships_(AR))
- [Armalite Rifle](/source/Armalite_Rifle) - [AR-15–style rifle](/source/AR-15%E2%80%93style_rifle), rifles based on ArmaLite's AR-15
- [Army Reserve (Ireland)](/source/Army_Reserve_(Ireland)), the land component of the Irish Reserve Defence Forces (RDF)

## Places

- [Ar (city)](/source/Ar_(city)), in ancient Moab
- [Appenzell Ausserrhoden](/source/Appenzell_Ausserrhoden), Switzerland
- [Province of Arezzo](/source/Province_of_Arezzo), Italy, vehicle registration code
- [Argentina](/source/Argentina) (ISO 3166-1 alpha-2 country code) - [.ar](/source/.ar), the country code Top Level Domain for Argentina
- [Arkansas](/source/Arkansas), United States
- [Armstrong–Ringsted Community School District](/source/Armstrong%E2%80%93Ringsted_Community_School_District), Iowa, United States
- [Arunachal Pradesh](/source/Arunachal_Pradesh), a state of India

## Politics and ethics

- [Affirmative Repositioning](/source/Affirmative_Repositioning), a political movement in Namibia
- [Animal rights](/source/Animal_rights), a philosophy
- [Animal rights movement](/source/Animal_rights_movement), a social movement advocating for other animals
- [Antipodean Resistance](/source/Antipodean_Resistance), an Australian neo-Nazi group

## Other uses

- [Alternate reality (disambiguation)](/source/Alternate_reality_(disambiguation)), includes various concepts
- 🜇 or AR, a [numismatic abbreviation](/source/List_of_numismatic_abbreviations) for "silver"
- [Argent](/source/Argent), the heraldic tincture of silver
- [Assistant referee (association football)](/source/Assistant_referee_(association_football))
- [Auto rickshaw](/source/Auto_rickshaw), a motorized three-wheeled vehicle common in South Asia
- [Avis de réception](/source/Avis_de_r%C3%A9ception), postal advice or acknowledgement of receipt

## See also

- [ARTV (disambiguation)](/source/ARTV_(disambiguation))

---
Adapted from the Wikipedia article [AR](https://en.wikipedia.org/wiki/AR) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/AR?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.