AT or at may refer to:

Geography

Austria

* Austria (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

* Anguilla (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) 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

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

* Astatine (symbol At), a chemical element * Ampere-turn (symbol At), an International System of Units (MKS) unit of magnetomotive force * Attotesla, 10⁻¹⁸ tesla, an SI derived unit of magnetic flux density * Technical atmosphere (symbol at), a physical unit of pressure

Other uses in science and technology

* Acceptance testing, in engineering * Appropriate technology, an ideological movement to scale technology to be appropriate to its context * Assistive technology, devices for people with disabilities * Anti-tank warfare * Automatic transmission, in vehicles

Other uses

* At, a preposition * At (cuneiform), a cuneiform sign * At, 1/100 of a Lao kip, a unit of currency * Aarne–Thompson classification system, used to classify folktales * Archive Team, a digital preservation group * Aliança da Terra, a Brazilian non-governmental organization * Alternative Tentacles, an independent record label * Auckland Transport, New Zealand, a public transport agency * Autolinee Toscane, Italy, a public transport agency * Aviation electronics technician (United States Navy), a job specialty * Royal Air Maroc (IATA airline designator AT)