Austria edit

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

United States edit

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

Elsewhere edit

• Antigua and Barbuda, 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)
• Australia, LOC MARC code

• Awami Tahreek a left-wing Pakistani political party

Computing edit

• @ (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 edit

• Anaerobic threshold, in physiology
• Análisis transaccional (Spanish for "transactional analysis"), a psychological method
• Antithrombin, a small protein molecule
• Ataxia–telangiectasia, an immunodeficiency disorder
• Athletic training
• Atrial tachycardia

Physics and chemistry edit

• Astatine (symbol At), a chemical element
• Ampere-turn (symbol A t), an International System of Units (MKS) unit of magnetomotive force
• Attotesla (symbol aT), 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 edit

• 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
• AT Protocol, a decentralized social network protocol by Bluesky
• Anti-tank warfare
• Automatic transmission, in vehicles

• 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
• Audiotool, a Digital audio workstation
• Autolinee Toscane, Italy, a public transport agency
• Aviation electronics technician (United States Navy), a job specialty
• Royal Air Maroc (IATA airline designator AT)
• A US Navy hull classification symbol: Fleet tug (AT)

 

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