FID

A fid is a conical tool traditionally made of wood or bone, used to work with rope and canvas.

FID or fid may also refer to:

• FID, IATA code for Elizabeth Field (Suffolk County, New York), U.S.
• FID, the country code used by FIDE
• The Fid, a mountain in Antarctica
• F.I.D. (album), by Masami Akita
• Fédération internationale de documentation (FID), a defunct international organization, see International Federation for Information and Documentation
• Financial institutions duty, an Australian tax
• Firearms identification (often, FID card), defined as part of gun laws in Massachusetts
• Flame ionization detector
• Flight initiation distance
• Foreign internal defense
• Fréchet inception distance, image quality metric
• Free induction decay
• Focus-image distance, in projectional radiography
• Stop the Decline (Italian: {{lang|it|Fermare il Declino}}), an Italian political party