AT
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AT may mean:
- AT Field, a force field in the anime Neon Genesis Evangelion
- Acceptance test
- Aero triangulation
- Alimentary tract
- Allied Telesyn
- Anaerobic threshold
- Análisis Transaccional (Spanish "Transactional analysis"), a psychological method
- Anguilla, WMO country code
- Anti-tank weapons
- Anti-Terrorism
- Appalachian Trail
- Appropriate Technology
- Ashmore and Cartier Islands (FIPS 10-4 territory code and obsolete NATO digram)
- Assistive technology
- IBM Personal Computer/AT
- AT form factor for motherboards and computer cases
- The common name for the 5-pin DIN keyboard connector
- Ataxia telangiectasia, an immunodeficiency disorder
- Atchison County, Kansas, county code
- Attack Team (game) a 2000 PC game
- Audit trail
- Austria (ISO 2-letter country code)
- Auto Trend
- Automatic transmission
- Aviation Electronics Technician, an enlisted rating in the United States Navy.
- Hayes command set for modems (all commands begin with the characters "AT")
- Royal Air Maroc (IATA airline designator)
- Abel Tasman, a seventeenth century Dutch explorer and merchant
At may mean:
- Ampere-turn (symbol), an MKS unit of magnetomotive force
- Astatine, chemical symbol for the chemical element
- a subdivision equal to 1/100 of a Kip, the unit of currency in Laos
aT may mean:
at may mean:
- the punctuation symbol, "@", now principally used in e-mail addresses
- at (Unix command), to schedule tasks to be performed at a later date
- technical atmosphere (symbol), physical unit of pressure
- an indication of position, time, target or state