# AAR

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{{Wiktionary|Aar|AAR}}

'''AAR''' or '''Aar''' may refer to:
{{TOC right}}

==Aviation==
* [AAR Corporation](/source/AAR_Corporation), an American aviation engineering company
* [Air-to-air refueling](/source/Air-to-air_refueling), the process of transferring aviation fuel from one military aircraft to another during flight
* IATA airport code for [Aarhus Airport](/source/Aarhus_Airport) in Mid Jutland Region, Denmark
* ICAO airline code for [Asiana Airlines](/source/Asiana_Airlines) of South Korea

==Geography==
*[Aar](/source/Aar), a river in Switzerland, tributary of the Rhine
*[Aar (Lahn)](/source/Aar_(Lahn)), a tributary of Lahn river in Germany, descending from the Taunus mountains
*[Aar (Dill)](/source/Aar_(Dill)), a tributary of  Dill river in Germany, also in the basin of the Lahn
*[Aar (Ill)](/source/Aar_(Ill)), a branch of the Ill river that separates from it in Strasbourg, France and rejoins it further north
*[Aar (Twiste)](/source/Aar_(Twiste)), a tributary of  Twiste river in Germany, in the basin of the Weser
*[Aar (village)](/source/Aar_(village)), a village in Rajasthan, India
*[South American–Antarctic Ridge](/source/South_American%E2%80%93Antarctic_Ridge), also known as the American–Antarctic Ridge, a mid-ocean ridge in the South Atlantic
*[Antarctica](/source/Antarctica), IAAF code AAR

==Military==
* [After-action review](/source/After-action_review), a structured review process used by the U.S. military
* [After action report](/source/After_action_report), a retrospective analysis
* Assistant Automatic Rifleman, a soldier who carries ammunition, see [Rifleman#Modern_tactics](/source/Rifleman).

==Organizations==
*[All American Racers](/source/All_American_Racers), a former Formula 1 and CART team
*[Allens (law firm)](/source/Allens_(law_firm)), a law firm (formerly known as Allens Arthur Robinson)
*[American Academy in Rome](/source/American_Academy_in_Rome), research and arts institution in Rome
*[American Academy of Religion](/source/American_Academy_of_Religion), an association of academics who research or teach topics related to religion
*[Association for Automated Reasoning](/source/Association_for_Automated_Reasoning), a non-profit that seeks to advance the field of automated reasoning
*[Association of American Railroads](/source/Association_of_American_Railroads), an industry trade group representing the railroads of North America

==Transportation==
*[AAR coupling](/source/AAR_coupling), railway coupling specification of the Association of American Railroads
*[AAR wheel arrangement](/source/AAR_wheel_arrangement), Association of American Railroads system for describing wheel arrangement of locomotives
*[All-American Road](/source/All-American_Road), a designation for some national scenic byways in the United States
*[Ann Arbor Railroad (disambiguation)](/source/Ann_Arbor_Railroad_(disambiguation))

==Other uses==
*[Aar (Star Wars)](/source/Aar_(Star_Wars)), fictional planet in ''Star Wars'' universe
*Aar, a fictional planet of the star Deneb, in the "[Captain Future](/source/Captain_Future)" stories
*[The All-American Rejects](/source/The_All-American_Rejects), an American rock band
*[Air America Radio](/source/Air_America_Radio), a domestic United States radio network
*[Average accounting return](/source/Average_accounting_return), a capital budgeting investment rule
*[Adam's apple reduction](/source/Adam's_apple_reduction), a surgery
*[Afar language](/source/Afar_language) (ISO 639 language identification code)
*''[African American Review](/source/African_American_Review)'', a journal
*[Amino acid response](/source/Amino_acid_response), the biochemical response of  a mammalian cell starved of amino acids
*"At any rate", see [List of SMS abbreviations](/source/List_of_SMS_abbreviations)
*[Alkali–aggregate reaction](/source/Alkali%E2%80%93aggregate_reaction), a chemical reaction leading to expansion in concrete

==See also==
*[Ahr](/source/Ahr), a river in Germany, tributary of the Rhine
*[Aare (disambiguation)](/source/Aare_(disambiguation))

{{Disambiguation|geo}}

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