// Workers AI · dad joke modeWhat did FD say to its date? "You're a format above the rest.

"FDs" redirects here. For other uses, see FDS.

FD or similar may refer to:

Biology

• Familial dysautonomia, a disorder of the autonomic nervous system
• Ferredoxin, iron–sulfur proteins

Computing

• File descriptor, in Unix and related computer operating systems
• Freedesktop.org (fd.o), an interoperability project
• Functional dependency, a constraint in a relation from a database

Transportation

Automotive

• Mazda RX-7 (FD), a car
• Nissan FD engine, for trucks and buses
• Formula Drift, an American motorsport series

Aviation

• Thai AirAsia, IATA airline code FD
• FD Phantom, original name for the FH Phantom jet fighter
• Flight director (aeronautics), a flight instrument

Other modes of transportation

• Russian locomotive class FD
• Flying Dutchman (dinghy)

Business and politics

• Fixed deposit, a financial instrument
• Finance Director, or chief financial officer, in a company
• Financial Dynamics, a UK business services and lobbying firm acquired by FTI Consulting in 2006
• Force of the Right (Forța Dreptei), a Romanian political party
• Fidei defensor (Latin, 'Defender of the Faith'), part of the full style of many English/British monarchs

Other uses

• Fire Department, providing firefighting services
• Canon FD lens mount, a standard for connecting a lens to a camera
• Fermi–Dirac statistics (F–D statistics), in quantum statistics

See also

• All pages with titles containing FD
• Floppy disk drive (FDD) in early computers