FF

FF, Ff, or ff may refer to:

• ‹ff›, a Latin alphabet digraph; it is used in English orthography to represent the same sound as single ‹f›, a typographic ligature
• 255 (number) (hexadecimal: FF₁₆), the natural number following 254 and preceding 256
• Femtofarad (fF), 1×10⁻¹⁵ farads or units of capacitance
• Fula language (ISO 639-1 code ff), a language of West Africa
• Mukti Bahini (Freedom Fighters), the armed organizations who fought against the Pakistan Army during the Bangladesh Liberation War
• Tower Air (IATA code: FF), a certificated FAR 121 schedule and charter U.S. airline that operated from 1983 until 2000
• Fianna Fáil, political party in the Republic of Ireland and Northern Ireland
• False flag, A diversionary or propaganda tactic

Arts

Comics

• Fantastic Four, a superhero team appearing in comic books published by Marvel Comics
• Future Foundation, a fictional superhero team that replaced the Fantastic Four after the death of Johnny Storm, also published by Marvel Comics

Film

• Logo of Finos Film, a former Greek film production company
• Found footage, a type of film genre in which all or a substantial part of a fictional film is presented as if it were discovered film or video recordings

Games

• Fatal Frame, a survival horror video game series
• Fatal Fury (series), a fighting video game series
• Final Fantasy, a role-playing video game series
• Final Fight, a beat 'em up video game
• Fortress Forever, a mod for the first-person shooter video game Half-Life 2
• League of Legends, surrender voting command"/ff"

Music

Bands

• Fear Factory, an American metal band
• Fleet Foxes, an American indie folk band
• Foo Fighters, an American rock band
• Franz Ferdinand, a Scottish rock band
• Freestyle Fellowship, an American hip hop group

Theory

• Fortissimo (ff), a dynamic indicator in music for "very loud"

Business

• FontFont, a font library by FontShop International
• Frequent flyer, often abbreviated as FF# on itineraries or travel documents

Culture

• ISO 639-1 code for Fulfulde language, a language of West Africa
• #FF, a Twitter hashtag for Follow Friday

Science

• Filtration fraction in renal physiology
• Frasnian-Famennian (F-F) mass extinction

Technology

• Fast forward, the forward movement through an audio or video recording faster than the speed at which it was originally recorded
• Feet forwards motorcycle
• Front-engine, front-wheel-drive layout, a car designed with a front engine and front-wheel drive, colloquially known as "FF" for short
• Ferguson Formula, Ferguson Research Ltd's term for four-wheel drive
• Front freewheel crankset for bicycles

Information Technology (IT)

• Fill factor (disambiguation), a term applied in various geometrical models and electronic devices
• 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
• Mozilla Firefox, a web browser developed by Mozilla Foundation
• 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

Other

• FF, a large brassiere cup size
• FF, an abbreviation of French Franc
• ff. (sing. f.), implies and the following pages, usually as a suffix to a page number in the index of a book
• ff – Südtiroler Wochenmagazin, an Italian weekly journal published in German language
• Jensen FF, the first non all-terrain production car equipped with 4WD and an anti-lock braking system
• Ferrari FF, a sports car
• Faraday Future, a car company
• Fist Fucking, a sexual activity