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ATR may refer to:


Medicine

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Acute transfusion reaction Blood transfusion is the process of transferring blood products into a person's circulation intravenously. Transfusions are used for various medical conditions to replace lost components of the blood. Early transfusions used whole blood, but mo ...
* Ataxia telangiectasia and Rad3 related, a protein involved in DNA damage repair


Science and mathematics

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Advanced Test Reactor The Advanced Test Reactor (ATR) is a research reactor at the Idaho National Laboratory, located east of Arco, Idaho. This reactor was designed and is used to test nuclear fuels and materials to be used in power plants, naval propulsion, research ...
, nuclear research reactor at the Idaho National Laboratory, US *
Attenuated total reflectance Attenuated total reflection (ATR) is a sampling technique used in conjunction with infrared spectroscopy which enables samples to be examined directly in the solid or liquid state without further preparation. ATR uses a property of total inter ...
in infrared spectroscopy *
Advanced tongue root In phonetics, advanced tongue root (ATR) and retracted tongue root (RTR) are contrasting states of the root of the tongue during the pronunciation of vowels in some languages, especially in Western and Eastern Africa, but also in Kazakh and Mong ...
, a phonological feature in linguistics *
Atractyloside Atractyloside (ATR) is a natural, toxic glycoside present in numerous plant species worldwide in the daisy family including '' Atractylis gummifera'' and '' Callilepis laureola'', and it's used for a variety of therapeutic, religious, and toxic ...
, a toxin and inhibitor of "ADP/ATP translocase" * ATR0, an axiom system in reverse mathematics


Technology

* Answer to reset, a message output by a contact Smart Card * Automatic target recognition, recognition ability *
Autothermal reforming Steam reforming or steam methane reforming (SMR) is a method for producing syngas (hydrogen and carbon monoxide) by reaction of hydrocarbons with water. Commonly natural gas is the feedstock. The main purpose of this technology is hydrogen product ...
, a natural gas reforming technology


Transport

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ATR (aircraft manufacturer) ATR ( French: Avions de transport régional; Italian: Aerei da Trasporto Regionale; or "Regional Transport Airplanes" in English) is a Franco-Italian aircraft manufacturer headquartered in Blagnac, France, a suburb of Toulouse. It was formed ...
an Italian-French aircraft manufacturer **
ATR 42 The ATR 42 is a regional airliner produced by Franco-Italian manufacturer ATR, with final assembly in Toulouse, France. On 4 November 1981, the aircraft was launched with ATR, as a joint venture between French Aérospatiale (now Airbus) and ...
airliner ** ATR 72 airliner * IATA code for
Atar International Airport Atar Airport or Atar International Airport is an airport serving Atar, a town in the Adrar Region of Mauritania. World War II During World War II, the airport was used by the United States Army Air Forces Air Transport Command as a stopover for ...
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Andaman Trunk Road National Highway 4, or NH 4, is the major highway in the Indian union territory of Andaman and Nicobar Islands. It is 230.7 km in length. This road running from the capital city of Port Blair to Diglipur connecting all major towns of Ferrar ...
* Air Transport Rack, standards for plug-in electronic modules in aviation and elsewhere; various suppliers e.g.
ARINC Aeronautical Radio, Incorporated (ARINC), established in 1929, was a major provider of transport communications and systems engineering solutions for eight industries: aviation, airports, defense, government, healthcare, networks, security, and t ...
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Atmore (Amtrak station) Atmore station is a former train station in Atmore, Alabama. It formerly served Amtrak's '' Sunset Limited'' line. It has been closed since 2005, after Amtrak stopped service of the ''Sunset Limited'' east of New Orleans due to the effects of Hu ...
, Amtrak station code ATR


Music

* All That Remains (band), an American heavy metal band *
Atari Teenage Riot Atari Teenage Riot (ATR) is a German band formed in Berlin in 1992. Highly political, they fuse left-wing, anarchist and anti-fascist views with punk vocals and a techno sound called digital hardcore, which is a term band member Alec Empire use ...
, a German techno band performing "digital hardcore" music ** ''ATR'' (song), a song by ATR


Organisations

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Absent Teacher Reserve Absent Teacher Reserve is a term referring to teachers who are no longer appointed to a specific school, but are reassigned to a school or number of schools within a school district or school system throughout the school year. It may also refer to a ...
, of teachers in New York City * Americans for Tax Reform *
Anglican Theological Review The ''Anglican Theological Review'' is the "unofficial journal of the seminaries of the Episcopal Church in the United States and the Anglican Church of Canada." Issues include peer-reviewed articles, poetry submissions, and book reviews. The jo ...


Other

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African Traditional Religion The traditional beliefs and practices of African people are highly diverse beliefs that include various ethnic religions.Encyclopedia of African Religion (Sage, 2009) Molefi Kete Asante Generally, these traditions are oral tradition, oral rather ...
* ATR: All Terrain Racing, a video game *
ATR.1 certificate The ATR.1 Certificate is a customs document used in trade between EU members and Turkey, to benefit from cheaper rates of duty. The legal basis for the use of the certificate is the EU-Turkey Customs Union. It is important to remember that not all ...
, in trade between EU and Turkey * ATR (company) (''Auto-Teile-Ring''), Germany * Average True Range, a market volatility indicator *
ATR (TV channel) ATR (Cyrillic: ''АТР'') is a Ukraine, Ukrainian TV Channel whose target audience is Crimean Tatars. It was broadcasting in Crimea, Ukraine from 1 September 2006 until 1 April 2015 when it was forced to shut down by Annexation of Crimea by the ...
, a Crimean Tatar TV Channel in Ukraine {{disambiguation