FF

FF, ff or fF may refer to:

FF, Freedom Fighters, a part of Mukti Bahini enrolled mainly from rural civilians who were engaged in guerilla warfare in the Bangladesh Liberation War against the Pakistani army
FF (or ff), a value in hexadecimal representing 255 (number)
Fula language (ISO 639-1 code ff)
ff (digraph), a pair of characters representing a single phoneme
ﬀ (ff) a common typographical ligature
fF, femtofarad, a unit of capacitance
FF, Firefighter, rescuers trained to put out hazardous fires
FF, Female Friend, female non-intimate friend that is closer than other friends, see Girlfriend
FF, Tower Air, the IATA code
ff., folio, Latin for "and pages following"
#FF, Follow Friday, hashtag used by Twitter users to suggest other users to follow

Arts

FF, Fantastic Four, nickname, fictional superhero team appearing in comic books published by Marvel Comics

Film festival, a venue for independent filmmakers or small studios to feature their cinema
Finos Film, the main filming company of Greece

Fan fiction, a derivative work of fiction written by a fan
Fantasy fiction, a genre of fiction utilizing supernatural or otherworldly motifs
Cai Lujun

See Dynamics (music) for Fortissimo, written ff, a musical direction meaning "very strong"
Foo Fighters, a post-grunge band
Fear Factory, an American heavy metal band
Flavor Flav, a hip-hop artist
Fleet Foxes, an American, Seattle based indie band
Franz Ferdinand (band), a popular Glaswegian pop band
Frou Frou (band), British pop music duo
"FF", a song by the band Umphrey's McGee from the band's first album, Greatest Hits Vol. III
"FF / VinterNoll2" is also a single released by the Swedish rock band Kent

Fatal Frame, a survival horror video game series where protagonists use cameras to exorcise spirits
Fatal Fury, a 2D fighting game series produced by SNK
Fiend Folio, a Dungeons & Dragons sourcebook
Fighting Fantasy, a series of role-playing game books that feature dice
Final Fantasy, an RPG franchise, primarily on consoles, now produced by Square Enix
- Final Fantasy (video game), the first game in the franchise, originally produced by Square Company
Final Fight, a side-scrolling beat 'em up series produced by Capcom
fumble or Forced Fumble, in American football, where the ball handler is deprived of possession by an opponent
Fortress Forever, a Half-Life 2 modification based on Valve Corporation's Team Fortress Classic
Freeway Flyboys, a cancelled North America version of Uchuu Race: Astro Go! Go!
Freedom Force (2002 video game), a superhero game by Irrational Games
Fucoss Fire, in DOTA

Faber and Faber, a British publishing house
Fieldbus Foundation, a not-for-profit corporation dedicated to the fieldbus networking standard
Flat fee, also known as "flat rate", or "linear rate"
FontFont, a font library by FSI FontShop International
Freight forwarder, a third party logistics provider

Flirty Fishing, a sexual form of proselytisation formerly employed by the Children of God / Family of Love religious movement
Fulfulde language, a language of West Africa
Full-forward in Australian rules or Gaelic football
Foot fetishism, a pronounced sexual interest in feet

Fianna Fáil, an Irish political party
Félix Fénéon, a French anarchist
Friendly fire, harm inflicted upon a soldier by an ally
U.S. Navy hull classification symbol for a frigate
Tailflash designation for U.S. Air Force aircraft stationed at Langley Air Force Base, Virginia
The initials FF appear on the Irish Defence Forces cap badge
Grumman FF, a US Navy biplane fighter of the 1930s

Fast forward, the forward movement through an audio or video recording faster than the speed at which it was originally recorded
Feet forwards motorcycle
FF layout, a car designed with a front engine and front-wheel drive
Furylfuramide, an early food preservative discovered to be a carcinogen
Feature freeze (Software engineering)

File format, any of numerous ways to encode information on digital media. Occasionally appears abbreviated as ff within particular file format extensions
- .ff file format, used by game developer Infinity Ward to store data securely
- .ff file format, used by imaging technologies corporation Agfa-Gevaert to store font outline data
- .ff file format, used by Arris CAD for Sigmac source code
Fill factor, a term applied to vision- or light-related parameters
FileFront, a video game download service
Mozilla Firefox, officially abbreviated Fx rather than FF, a web browser
Flip-flop (electronics), a digital electronic circuit memory element
Form Feed, a control character in the C0 control code set used in ASCII
Full-frame digital SLR, a camera fitted with an image sensor equivalent in size to traditional 35mm film
FriendFeed, a real-time feed aggregator
FormatFactory, a file converter program
Adobe Font Folio, a program from Adobe Systems
For Fucksake Programming, any design that avoids all good Object-oriented programming practice (derived from the bitwise complement of OO Programming)

Filtration fraction in renal physiology
FF, a large brassiere cup size
FF, an abbreviation of French Franc
Formula Ford SCCA class designator FF
ff., implies and the following pages, usually as a suffix to a page number in the index of any book
ff - Südtiroler Wochenmagazin, an Italian weekly journal published in German language
Fisherman's Friend, a brand of throat lozenges
Fist Fuck (or Fist Fucking), the sexual practice of fisting