FB

FB, Fb, or fb may refer to:

Arts and media

 * F♭ (musical note)
 * FB (band), an electronic music collaboration of Benny Benassi and Ferry Corsten
 * Facebook, a social networking website, also known as FB.com
 * Meta Platforms, formerly Facebook Inc (Nasdaq: FB), parent company of Facebook
 * Friendship book, a booklet swapped amongst pen pals
 * Frostbite (game engine), a video game engine
 * FB, known as Trucksy in the US, an old green pickup truck from Roary the Racing Car

Computing

 * Framebuffer, in computer technology
 * FreeBASIC, a 32-bit compiler using BASIC syntax for DOS, Windows, and Linux
 * FictionBook, an open XML-based e-book format hailing from Russia

Other uses in science and technology

 * F B swamp vehicle, a Japanese military vehicle used for crossing difficult swampy terrain
 * Fast busy, or reorder tone, a type of telephone signal
 * Feedback, in signaling systems
 * Femtobarn, a small unit of area used in high energy physics
 * Fluidized bed, a special technology used in energy, reactor, chemical engineering etc.
 * Hyundai FB, a series of buses manufactured by Hyundai Motor Company
 * Foreign body, any object originating outside the body

Sport

 * Fenerbahçe, a Turkish sports club
 * Fly ball, a type of batted ball or a pitching stat in baseball
 * Football
 * Fullback (American football), a position in American football
 * Full-back (association football), a position in association football

Other uses

 * Bulgaria Air (Bulgarian: България еър, IATA code FB), the flag carrier airline of Bulgaria
 * Firebase or Fire support base, an artillery encampment
 * Footbridge (fb on some maps), a bridge designed for pedestrians
 * Fremont Bank, a US based retail and commercial bank
 * FB "Łucznik" Radom, a Polish defence industry enterprise from Radom that produces firearms