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FT or ft may refer to:

Arts, entertainment, and media[edit]

Businesses and organizations[edit]

Science and technology[edit]


  • .ft, the filename extension of Lotus Notes full type indexes
  • FaceTime, a video chat feature on Apple devices
  • Fault Tolerance, the property that enables a system to continue operating properly in the event of the failure of some of its components


  • EMD FT, an American diesel-electric railway locomotive
  • Northrop XFT, an American 1930s fighter aircraft
  • Renault FT, a tank used in the First World War

Other uses in science and technology[edit]

  • Failure tree, in safety engineering and reliability engineering analysis
  • Fourier transform, in signal processing, which transforms a function between time and frequency domains
  • Fluctuation theorem, in physics relates to the probability distribution of the time-averaged irreversible entropy production
  • Impulse (physics), the product of force and time (Ft)

Other uses[edit]