FD or similar may refer to:

Science and technology

* Canon FD lens mount, a standard for connecting a lens to a camera *

Familial dysautonomia Familial dysautonomia (FD), also known as Riley-Day Syndrome, is a rare, progressive, recessive genetic disorder of the autonomic nervous system that affects the development and survival of sensory, sympathetic and some parasympathetic neurons ...

, a disorder of the autonomic nervous system *

Fermi–Dirac statistics Fermi–Dirac statistics (F–D statistics) is a type of quantum statistics that applies to the physics of a system consisting of many non-interacting, identical particles that obey the Pauli exclusion principle. A result is the Fermi–Dirac di ...

(F–D statistics), in quantum statistics *

Ferredoxin Ferredoxins (from Latin ''ferrum'': iron + redox, often abbreviated "fd") are iron–sulfur proteins that mediate electron transfer in a range of metabolic reactions. The term "ferredoxin" was coined by D.C. Wharton of the DuPont Co. and applied t ...

, iron–sulfur proteins *

File descriptor In Unix and Unix-like computer operating systems, a file descriptor (FD, less frequently fildes) is a process-unique identifier (handle) for a file or other input/output resource, such as a pipe or network socket. File descriptors typically have ...

, in Unix and related computer operating systems *

Freedesktop.org freedesktop.org (fd.o) is a project to work on interoperability and shared base technology for free-software desktop environments for the X Window System (X11) and Wayland on Linux and other Unix-like operating systems. It was founded by Hav ...

(fd.o), an interoperability project *

Functional dependency In relational database theory, a functional dependency is a constraint between two sets of attributes in a relation from a database. In other words, a functional dependency is a constraint between two attributes in a relation. Given a relation '' ...

, a constraint in a relation from a database *

Nissan FD engine The Nissan FD engine is used primarily for Nissan Truck and Bus commercial vehicles. It is a 4 cylinder.Nissan Atlas model H40-H41 Series Workshop Manual FD33 * @ 3600 rpm @ 2000 rpm Nissan Atlas (H40) 1984-1986 FD33T *turbodiesel @ 3600 rpm ...

, for trucks and buses

Transportation

Thai AirAsia Thai AirAsia (, th, ไทยแอร์เอเชีย) is a joint venture of Malaysian low-fare airline AirAsia ( th, แอร์เอเชีย) and Thailand's Asia Aviation. It serves AirAsia's regularly scheduled domestic and int ...

, IATA airline code FD *

Mazda RX-7 (FD) The Mazda RX-7 is a front-engine, rear-wheel-drive, rotary engine-powered sports car that was manufactured and marketed by Mazda from 1978 until 2002 across three generations, all of which made use of a compact, lightweight Wankel rotary engine. ...

, a car *

FD Phantom The McDonnell FH Phantom is a twinjet fighter aircraft designed and first flown during World War II for the United States Navy. The Phantom was the first purely jet-powered aircraft to land on an American aircraft carrier and the first jet dep ...

, original name for the FH Phantom jet fighter *

Russian locomotive class FD The Soviet locomotive class FD (russian: ФД; ) was a Soviet main freight steam locomotive type named after Felix Dzerzhinsky (russian: Феликс Дзержинский; ). Between 1932 and 1942, 3213 FD series locomotives were built. History ...

Flight director (aeronautics) In aviation, a flight director (FD) is a flight instrument that is overlaid on the attitude indicator that shows the pilot of an aircraft the attitude required to execute the desired flight path. Flight directors are mostly commonly used during ...

, a flight instrument *

Flying Dutchman (dinghy) The Flying Dutchman is a Dutch planing sailing dinghy that was designed by Uus Van Essen and Conrad Gülcher as a high performance, one design racer and first built in 1951. The boat was an Olympic sailing class from 1960 until 1992. P ...

Other uses

Fidei defensor Defender of the Faith ( la, Fidei Defensor or, specifically feminine, '; french: Défenseur de la Foi) is a phrase that has been used as part of the full style of many English, Scottish, and later British monarchs since the early 16th century. It ...

(Latin, 'Defender of the Faith'), part of the full style of many English/British monarchs *

Fixed deposit A fixed deposit (FD) is a financial instrument provided by banks or NBFCs which provides investors a higher rate of interest than a regular savings account, until the given maturity date. It may or may not require the creation of a separate accou ...

, a financial instrument *

Finance Director The chief financial officer (CFO) is an officer of a company or organization that is assigned the primary responsibility for managing the company's finances, including financial planning, management of financial risks, record-keeping, and financ ...

, or chief financial officer, in a company *

Fire Department A fire department (American English) or fire brigade (Commonwealth English), also known as a fire authority, fire district, fire and rescue, or fire service in some areas, is an organization that provides fire prevention and fire suppression se ...

, providing firefighting services *

Force of the Right Force of the Right ( ro, Forța Dreptei, FD), sometimes translated as Right's Force or Right Force, is a liberal-conservative political party in Romania founded in December 2021 by Ludovic Orban, former National Liberal Party (PNL) president and ...

(''Forța Dreptei''), a Romanian political party

Science and technology

Transportation

Other uses

See also