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FetLife
FetLife, a social networking website for the BDSM, fetish, and kink community, was founded in 2008 by Canadian developer John Baku and has about 13 million members.
FEV (engineering company)
FEV, based in Aachen, Germany, is an engineering services company founded in 1978 by Franz Pischinger that develops powertrains, vehicles, batteries, software, and energy systems.
Fever (app)
Fever is a New York-based event discovery and ticketing platform that lists over 150,000 experiences and produces Candlelight Concerts, valued at $1.8 billion in 2023.
Fever Labs, Inc.
Fever Labs, Inc. is a New York-based company operating an event discovery and ticketing platform for live entertainment, known for its Candlelight concert series and its 2025 acquisition of DICE.
Few-mode fiber
Few-mode fiber (FMF) is an optical fiber designed to guide a few spatial modes, typically fewer than ten, so each can carry an independent data channel.
Few-shot class-incremental learning
Few-shot class-incremental learning (FSCIL) is a machine learning setting in which a model trained on base classes must learn new classes from few examples without forgetting.
Few-shot learning
Few-shot learning is a machine learning approach in which a model learns a new task from a few labeled examples, often by transferring knowledge from related tasks.
Few-shot object detection
Few-shot object detection (FSOD) is a machine learning task in which a detector recognizes and localizes objects of novel classes from only a small number of labeled examples.
Feynman (microarchitecture)
Nvidia Feynman is Nvidia's next-generation datacenter GPU architecture, announced by CEO Jensen Huang at GTC in March 2025 as the successor to Rubin Ultra, targeting 2028 with custom HBM and optical NVLink.
FF(X)
FF(X), also known as Faraday X (FX), is the mass-market electric vehicle brand of Faraday Future, announced in 2024, whose first product is the FX Super One MPV.
Ffestiniog Railway
The Ffestiniog Railway (Rheilffordd Ffestiniog) is a 13½-mile narrow gauge railway in northwest Wales, opened in 1836 to carry slate from Blaenau Ffestiniog to Porthmadog.
FFmpeg
FFmpeg is a free and open-source multimedia framework that decodes, encodes, streams, filters, and plays audio and video, created by Fabrice Bellard in 2000 and used by Chrome, Firefox, and VLC.
FG 42
The FG 42 (Fallschirmjägergewehr 42, paratrooper rifle 42) was a selective-fire rifle developed in Nazi Germany for Luftwaffe paratroopers, combining rifle and light machine gun roles.
FGC-9
The FGC-9 is a hybrid 3D-printed semi-automatic pistol-caliber carbine designed by JStark1809 and released online in March 2020; it requires no regulated firearm parts and is the world's most widely built privately made firearm.
FGEN Batangas FSRU
FGEN Batangas FSRU is an LNG import terminal in Batangas City, Philippines, built around the floating storage and regasification vessel BW Batangas, which received its first LNG cargo in August 2023.
FGM-148 Javelin
The FGM-148 Javelin, also called the Javelin ATGM, is an American man-portable, fire-and-forget anti-tank missile system fielded since 1996 and built by Lockheed Martin and Raytheon, used heavily by Ukraine.
FH70
The FH70, short for Field Howitzer for the 1970s, is a 155 mm towed howitzer developed jointly by the United Kingdom, West Germany, and Italy, entering service in 1978.
Fiat
Fiat (Fabbrica Italiana Automobili Torino) is an Italian automobile manufacturer founded in Turin in 1899 by Giovanni Agnelli, for over a century Italy's principal carmaker.
Fiat 124
The Fiat 124 is a four-door saloon Fiat introduced in 1966, named Car of the Year 1967 and produced worldwide in over 20 million units.
Fiat 124 Spider (2016)
The Fiat 124 Spider is a two-seat roadster sold from 2016 to 2020, built by Mazda in Japan with Fiat's turbocharged engine and bodywork, reviving the 1966 original.
Fiat 124 Sport Spider
The Fiat 124 Sport Spider, also sold later as the Pininfarina Spider, is a 2+2 convertible presented at the 1966 Turin Motor Show and built until 1985.
Fiat 126
The Fiat 126, nicknamed Maluch in Poland, is a rear-engined two-door city car introduced by Fiat in 1972 as the successor to the Fiat 500 and built until 2000.
Fiat 128
The Fiat 128 is a small family car produced by Fiat from 1969 to 1985, whose transverse engine layout became the template for the modern small car.
Fiat 131
The Fiat 131, also known as the Fiat SuperMirafiori, is a rear-wheel-drive family car built by Fiat in Turin from 1974 to 1986, replacing the Fiat 124.
Fiat 500
The Fiat 500 (Cinquecento) is an Italian city car from Fiat, made in three generations: the original 1957 to 1975 classic, a 2007 retro revival, and an electric 2020 model.
Fiat 500 (2007)
The Fiat 500 is a three-door city car launched by Fiat on 4 July 2007, 50 years after the original Nuova 500, as a modern reinterpretation of the Italian icon.
Fiat 500L
The Fiat 500L is a five-door compact multi-purpose vehicle produced by Italian manufacturer Fiat from 2012, stretching the Fiat 500 city-car name into a taller family car.
Fiat 500X
The Fiat 500X is a subcompact crossover SUV produced by Fiat from 2014, styled as a larger, higher-riding extension of the Fiat 500 city car family.
Fiat 600
The Fiat 600, nicknamed Fitito in Argentina, is a small rear-engined family car introduced by Fiat in 1955 and built until 1969, with millions produced.
Fiat 850
The Fiat 850 is a small rear-engined, rear-wheel-drive car that Fiat launched in May 1964 as an evolution of the Fiat 600, selling about 2.2 million units by 1971.