The word at is an English word, which may act as a preposition. AT (or similar) may also refer to:



* Austria (ISO 2-letter country code) * .at, Internet country code top-level domain

United States

* Atchison County, Kansas (county code) * Appalachian Trail, 2,000+ -mile mountainous trail in eastern United States


* Anguilla (World Meteorological Organization country code) * Ashmore and Cartier Islands (FIPS 10-4 territory code, and obsolete NATO country code) * At, Bihar, village in Aurangabad district of Bihar, India * Province of Asti, Italy (ISO 3166-2:IT code)

Science and technology

In computing

* @ (or "at sign"), the punctuation symbol now typically used in e-mail addresses (and more recently, tweets) * at (command), a 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 ** A five-pin DIN connector for a keyboard * Hayes command set for computer modems (each command begins with character-string "AT")

In biology and medicine

* Anaerobic threshold, in physiology * ''Análisis transaccional'' (Spanish for "transactional analysis"), a psychological method * Antithrombin, a small protein molecule that inactivates several enzymes of the coagulation system * Ataxia telangiectasia, an immunodeficiency disorder * Athletic Trainer

In physics and chemistry

* Astatine, a chemical element with symbol At * 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 test, in engineering * Appropriate technology, an ideological movement founded by economist Dr. Ernst Friedrich "Fritz" Schumacher * Assistive technology, devices for people with disabilities * Anti-tank weapon * Automatic transmission, in vehicles

Other uses

* At, a subdivision equal to 1/100 of a Kip, the unit of currency in Laos * Archive Team, a digital preservation group * Aliança da Terra, a Brazilian non-governmental organization * Aarne-Thompson classification system, used to classify folktales * Aviation Electronics Technician, a rating in the United States Navy * Auckland Transport, responsible for public transport in Auckland, New Zealand * Royal Air Maroc (IATA airline designator)

See also

* * * * AT1 (disambiguation) * ATS (disambiguation) {{disambiguation hu:IBM-kompatibilis PC#Az AT szabvány