AustriaEdit

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

United StatesEdit

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

ElsewhereEdit

• 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)

In computingEdit

• @ (or "at sign"), the punctuation symbol now typically used in e-mail addresses and 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 medicineEdit

• 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 training

In physics and chemistryEdit

• 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 technologyEdit

• Acceptance testing, in engineering
• Appropriate technology, an ideological movement founded by economist Dr. Ernst Friedrich "Fritz" Schumacher
• Assistive technology, devices for people with disabilities
• Anti-tank warfare
• Automatic transmission, in vehicles

• At (cuneiform), a cuneiform sign
• At, a subdivision equal to 1/100 of a Kip, the unit of currency in Laos
• 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, responsible for public transport in Auckland, New Zealand
• Autolinee Toscane, responsible for public transport in Tuscany, Italy
• Aviation electronics technician (United States Navy), a rating
• Royal Air Maroc (IATA airline designator)

• All pages with titles beginning with at
• All pages with titles beginning with AT
• All pages with titles containing AT
• AT1 (disambiguation)
• ATS (disambiguation)