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The word at is an English word, which may act as a preposition.

AT (or similar) may also refer to:


Science and technology[edit]

In computing[edit]

  • @ (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
  • Hayes command set for computer modems (all commands begin with the characters "AT")

In biology and medicine[edit]

In physics and chemistry[edit]

  • 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[edit]

Other uses[edit]

See also[edit]