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AT or at may refer to:


Geography


Austria

*
Austria Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...
(ISO 2-letter country code) *
.at .at is the Internet country code top-level domain (ccTLD) for Austria. It is administered by nic.at. Second-level domains The .at top-level domain has a number of second-level domains: * .ac.at (reserved for academic institutions, especially u ...
, Internet country code top-level domain


United States

* Atchison County, Kansas (county code) * The Appalachian Trail (A.T.), a 2,180+ mile long mountainous trail in the Eastern United States


Elsewhere

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Anguilla Anguilla ( ) is a British Overseas Territory in the Caribbean. It is one of the most northerly of the Leeward Islands in the Lesser Antilles, lying east of Puerto Rico and the Virgin Islands and directly north of Saint Martin. The territo ...
(World Meteorological Organization country code) * Ashmore and Cartier Islands (FIPS 10-4 territory code, and obsolete NATO country code) *
At, Bihar At is a village in Aurangabad, Bihar, India. It is in the Madanpur tehsil A tehsil (, also known as tahsil, taluka, or taluk) is a local unit of administrative division in some countries of South Asia. It is a subdistrict of the area within a d ...
, village in Aurangabad district of Bihar, India *
Province of Asti The Province of Asti ( it, Provincia di Asti, Piedmontese: ''Provincia d’Ast'') is a province in the Piedmont region of northern Italy. Its capital is the city of Asti. To the northwest it borders on the Metropolitan City of Turin; to the sou ...
, Italy (ISO 3166-2:IT code)


Science and technology


Computing

* @ (or " at sign"), the punctuation symbol now typically used in e-mail addresses and tweets) * at (command), used to schedule tasks or other commands to be performed or run at a certain time * IBM Personal Computer/AT **
AT (form factor) In the era of IBM compatible personal computers, the AT form factor comprises the dimensions and layout ( form factor) of the motherboard for the IBM AT. Baby AT motherboards are a little smaller, measuring 8.5" by 13". Like the IBM PC and IBM X ...
for motherboards and computer cases ** AT connector, a five-pin DIN connector for a keyboard * The Hayes command set for computer modems (each command begins with the character string "AT")


Biology and medicine

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Anaerobic threshold Lactate inflection point (LIP), is the exercise intensity at which the blood concentration of lactate and/or lactic acid begins to increase rapidly. It is often expressed as 85% of maximum heart rate or 75% of maximum oxygen intake. When exercisin ...
, in physiology * ''Análisis transaccional'' (Spanish for " transactional analysis"), a psychological method * Antithrombin, a small protein molecule * Ataxia–telangiectasia, an immunodeficiency disorder *
Athletic training Athletic training is an allied health care profession recognized by the American Medical Association (AMA)"What is an Athletic Trainer?". The Board of Certification Website. 2003. Athletic training is also recognized by the Health Resources Serv ...


Physics and chemistry

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Astatine Astatine is a chemical element with the symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; ...
(symbol At), a chemical element *
Ampere-turn The ampere-turn (A⋅t) is the MKS (metre–kilogram–second) unit of magnetomotive force (MMF), represented by a direct current of one ampere flowing in a single-turn loop in a vacuum. " Turns" refers to the winding number of an electrical con ...
(symbol At), an International System of Units (MKS) unit of magnetomotive force *
Attotesla The tesla (symbol: T) is the unit of magnetic flux density (also called magnetic B-field strength) in the International System of Units (SI). One tesla is equal to one weber per square metre. The unit was announced during the General Conference ...
, 10−18 tesla, an SI derived unit of magnetic flux density *
Technical atmosphere Technical may refer to: * Technical (vehicle), an improvised fighting vehicle * Technical analysis, a discipline for forecasting the future direction of prices through the study of past market data * Technical drawing, showing how something is co ...
(symbol at), a physical unit of pressure


Other uses in science and technology

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Acceptance testing In engineering and its various subdisciplines, acceptance testing is a test conducted to determine if the requirements of a specification or contract are met. It may involve chemical tests, physical tests, or performance tests. In systems en ...
, in engineering * Appropriate technology, an ideological movement to scale technology to be appropriate to its context *
Assistive technology Assistive technology (AT) is a term for assistive, adaptive, and rehabilitative devices for people with disabilities and the elderly. Disabled people often have difficulty performing activities of daily living (ADLs) independently, or even with ...
, devices for people with disabilities *
Anti-tank warfare Anti-tank warfare originated from the need to develop technology and tactics to destroy tanks during World War I. Since the Triple Entente deployed the first tanks in 1916, the German Empire developed the first anti-tank weapons. The first devel ...
*
Automatic transmission An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in internal combustion engine-based motor vehicles that does not require any input from the driver to change forward gears under normal driving c ...
, in vehicles


Other uses

* At, a
preposition Prepositions and postpositions, together called adpositions (or broadly, in traditional grammar, simply prepositions), are a class of words used to express spatial or temporal relations (''in'', ''under'', ''towards'', ''before'') or mark various ...
*
At (cuneiform) The cuneiform sign at, is a common-use sign of the Amarna letters, the ''Epic of Gilgamesh,'' and other cuneiform texts (for example Hittite texts). It has secondary uses in the Amarna letters for ''"ad"''. Linguistically, it has the alpha ...
, a cuneiform sign * At, 1/100 of a
Lao kip The kip ( lo, ກີບ, kib; code: LAK; sign: ₭ or ₭N; french: kip; officially: ເງີນກີບລາວ, lit. "currency Lao kip") is the currency of Laos since 1955. Historically, one kip was divided into 100 ''att'' (). The term d ...
, a unit of currency * Aarne–Thompson classification system, used to classify folktales * Archive Team, a digital preservation group *
Aliança da Terra Aliança da Terra (AT), or the Land Alliance, is a Brazilian non-governmental organization that connects farmers, researchers, environmentalists and entrepreneurs in the agribusiness industry to promote environmental awareness and land management pr ...
, a Brazilian non-governmental organization *
Alternative Tentacles Alternative Tentacles is an independent record label established in 1979 in San Francisco, California. It was used by Dead Kennedys for the self-produced single " California Über Alles". After realizing the potential for an independent label, t ...
, an independent record label * Auckland Transport, New Zealand, a public transport agency *
Autolinee Toscane Autolinee Toscane S.p.A. (also known as AT) is a private Italian company, wholly owned by RATP Dev, active in the local public transport sector. It manages several urban and suburban bus lines in Tuscany for a total of 1.7 million kilometres trav ...
, Italy, a public transport agency *
Aviation electronics technician (United States Navy) Aviation electronics technician (AT) is a US Navy enlisted rating or job specialty (often called MOS or AFSC by other services). At the paygrade of E-9 (master chief petty officer), ATs merge with the aviation electrician's mate (AE) rating to bec ...
, a job specialty *
Royal Air Maroc Royal Air Maroc (; ar, الخطوط الملكية المغربية, , literally ''Royal Moroccan Lines'' or ''Royal Moroccan Airlines''; ber, ⴰⵎⵓⵏⵉ ⴰⵢⵍⴰⵍ ⴰⴳⵍⴷⴰⵏ ⵏ ⴰⵎⵓⵔⴰⴽⵓⵛ, ''Amuni Aylal Age ...
(IATA airline designator AT)


See also

* * * *
AT1 (disambiguation) AT1 may refer to: * Angiotensin II receptor type 1 * Additional Tier 1 capital, see Contingent convertible bond * Yamaha AT1 (1969-1971) motorcycle * Ekspress AT1, communications satellite AT1 in the Ekspress network * AeroTech Release 1; tablet ...
*
ATS (disambiguation) ATS or Ats may refer to: Businesses * ATS Wheels, or ''Auto Technisches Spezialzubehör'', a German wheel manufacturer and sponsor of a Formula One racing team * ATS Automation Tooling Systems, an Ontario, Canada-based factory automation company ...
{{disambiguation hu:IBM-kompatibilis PC#Az AT szabvány