ATR may refer to:

Medicine

Acute transfusion reaction Blood transfusion is the process of transferring blood products into a person's Circulatory system, circulation intravenously. Transfusions are used for various medical conditions to replace lost components of the blood. Early transfusions used ...

Ataxia telangiectasia and Rad3 related Serine/threonine-protein kinase ATR, also known as ataxia telangiectasia and Rad3-related protein (ATR) or FRAP-related protein 1 (FRP1), is an enzyme that, in humans, is encoded by the ''ATR'' gene. It is a large kinase of about 301.66 kDa. ATR ...

, a protein involved in DNA damage repair

Science and mathematics

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, researc ...

, 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 intern ...

in infrared spectroscopy *

Advanced tongue root In phonetics, advanced tongue root (ATR or +ATR), or expanded pharynx, and retracted tongue root (RTR or −ATR) are contrasting states of the pharynx during the pronunciation of vowels in some languages, especially in Western and Eastern Afri ...

, 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 Reverse mathematics is a program in mathematical logic that seeks to determine which axioms are required to prove theorems of mathematics. Its defining method can briefly be described as "going backwards from the theorems to the axioms", in cont ...

Technology

Answer to reset An Answer To Reset (ATR) is a message output by a contact Smart Card conforming to ISO/IEC 7816 standards, following electrical reset of the card's chip by a card reader. The ATR conveys information about the communication parameters proposed by th ...

, a message output by a contact Smart Card *

Automatic target recognition Automatic target recognition (ATR) is the ability for an algorithm or device to recognize targets or other objects based on data obtained from sensors. Target recognition was initially done by using an audible representation of the received signal ...

, 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 often hydrogen ...

, a natural gas reforming technology

Transport

ATR (aircraft manufacturer) ATR (, ) is a Franco- Italian aircraft manufacturer headquartered in Blagnac, France, a suburb of Toulouse. The company was founded in 1981 as a joint venture (known as an Economic Interest Group or GIE under French law) between Aérospatial ...

an Italian-French aircraft manufacturer **

ATR 42 The ATR 42 is a regional airliner produced by Franco-Italian manufacturer ATR (aircraft manufacturer), ATR, with final assembly in Toulouse, France. On 4 November 1981, the aircraft was launched with ATR, as a joint venture between French Aér ...

airliner **

ATR 72 The ATR 72 is a twin-engine turboprop, short-haul regional airliner developed and produced in France and Italy by aircraft manufacturer ATR. The number "72" in its name is derived from the aircraft's typical standard seating capacity of 72 pa ...

airliner * IATA code for

Atar International Airport Atar Airport or Atar International Airport is an airport serving Atar, Mauritania, Atar, a town in the Adrar (region), Adrar Region of Mauritania. World War II During World War II, the airport was used by the United States Army Air Forces Air Tr ...

* Andaman Trunk Road * 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 ...

* Atmore (Amtrak station), Amtrak station code ATR

Music

All That Remains (band) All That Remains is an American Heavy metal music, heavy metal band from Springfield, Massachusetts, formed in 1998. They have released ten studio albums, a All That Remains: Live, live CD and DVD, and have sold over a million records worldwide ...

, 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 anarchist and anti-fascist views with punk vocals and a techno sound called digital hardcore, which is a term band member Alec Empire used as the na ...

, a German techno band performing "digital hardcore" music ** ''ATR'' (song), a song by ATR

Organisations

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 ...

, of teachers in New York City *

Americans for Tax Reform Americans for Tax Reform (ATR) is a politically conservative U.S. advocacy group whose stated goal is "a system in which taxes are simpler, flatter, more visible, and lower than they are today." According to ATR, "The government's power to contr ...

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 jour ...

Other

African Traditional Religion The beliefs and practices of African people are highly diverse, and include various ethnic religions.Encyclopedia of African Religion (Sage, 2009) Molefi Kete Asante Generally, these traditions are oral rather than scriptural and are passed dow ...

* A US Navy hull classification symbol: Rescue tug (ATR) * ATR: All Terrain Racing, a video game *

ATR.1 certificate The ATR.1 Certificate is a customs document used in trade between European Union 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. Products not included in the ...

, in trade between the European Union and Turkey *

ATR (company) ATR (Auto-Teile-Ring, English: “Spare Parts Pool”) is the corporate umbrella of one of the world's largest independent trading cooperations for automotive spare parts and a service center for three garage service concepts. The headquarters ...

(''Auto-Teile-Ring''), Germany * Average True Range, a market volatility indicator * ATR (TV channel), a Crimean Tatar television channel in Ukraine {{disambiguation