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Fowler's Ghost
Fowler's Ghost was an experimental fireless, condensing steam locomotive built in 1861 to John Fowler's design for London's Metropolitan Railway; it failed its trials and was scrapped.
Fox Creek Oil and Gas Field
The Fox Creek Oil and Gas Field is an unconventional oil and gas field in west-central Alberta, Canada, centered on the town of Fox Creek, discovered in 1957.
Fox One
Fox One is an American streaming service from Fox Corporation, launched in August 2025, carrying live FOX News, FOX Sports, and the FOX Network for $19.99 a month.
Fox Squirrel Solar
Fox Squirrel Solar is a 577 MW utility-scale solar power plant in Madison County, Ohio, the largest in Ohio, owned by EDF Renewables and Enbridge.
Foxboro (distributed control system)
Foxboro is a distributed control system for process industries, originated by The Foxboro Company of Massachusetts, whose I/A Series of 1987 remains in service under Schneider Electric, which acquired the line in 2014.
Foxconn
Foxconn, also known as Hon Hai Precision Industry, is a Taiwanese multinational electronics contract manufacturer founded in 1974, the world's largest and principal assembler of Apple's iPhones.
FoxPro
FoxPro, originally FoxBASE, is a data-centric programming language and development environment created by Fox Software in 1984, bought by Microsoft in 1992, and retired in 2015.
Foxton Locks
Foxton Locks is a flight of ten staircase canal locks on the Grand Union Canal in Leicestershire, England, built between 1810 and 1814 to raise the canal 75 feet.
Foxtron
Foxtron (鸿华先进) is a Taiwanese electric vehicle developer and manufacturer founded in 2020 as a joint venture of Foxconn and Yulon Group, selling EVs under a CDMS model.
Foxtron Bria
The Foxtron Bria is a battery-electric crossover wagon built by Foxtron, a Foxconn and Yulon joint venture, and unveiled in December 2025 as Taiwan's first export EV.
Foxtrot Gas Field
Foxtrot is an offshore natural gas field off Côte d'Ivoire, discovered in 1981 and producing since 1999, the country's largest and main supplier of gas for electricity.
Foy–Breguet telegraph
The Foy–Breguet telegraph was a French needle telegraph whose two needles moved through Chappe semaphore positions, letting trained semaphore operators send electrically; it served France from 1845.
FP (programming language)
FP is a function-level programming language defined by John Backus in his 1977 Turing Award lecture, in which programs are built by combining functions without naming arguments.
FP-45 Liberator
The FP-45 Liberator, or Woolworth gun, was a single-shot .45 pistol the United States produced in 1942, making about one million in ten weeks for resistance fighters in occupied territories.
FP-5 Flamingo
The FP-5 Flamingo, also known as the Flamingo missile, is a Ukrainian ground-launched subsonic cruise missile developed by Fire Point, with a claimed range of up to 3,000 kilometers.
FP-Growth
FP-Growth is a data mining algorithm for frequent itemsets that compresses the database into an FP-tree and avoids candidate generation, proposed at SIGMOD in 2000.
FP-growth algorithm
FP-growth is a frequent itemset mining algorithm that compresses a transaction database into an FP-tree and finds all frequent itemsets without candidate generation, about ten times faster than Apriori.
FP4 and NVFP4 inference
FP4 inference runs foundation models with weights and activations in 4-bit floating point, notably MXFP4 and NVIDIA's NVFP4, which entered mainstream serving with Blackwell GPUs in 2025.
FP8 inference
FP8 inference is the practice of running neural networks with weights and activations stored as 8-bit floating-point numbers, halving bit width to roughly double compute.
FPGA prototyping
FPGA prototyping maps a hardware design onto field-programmable gate arrays, building a fast, reconfigurable prototype that ASIC makers use to validate designs before committing to a mask.
FPGA-based CPU prototyping and emulation platforms
FPGA-based CPU prototyping and emulation platforms run processor designs on FPGAs before silicon exists, executing firmware and operating systems 1,000 to 10,000 times faster than software simulation.
FPRAS
An FPRAS (fully polynomial randomized approximation scheme) is a randomized algorithm that estimates counting problems within relative error ε with probability 1 − δ, in polynomial time.
FPT (complexity)
FPT, or fixed-parameter tractable, is the class of decision problems solvable in time f(k)·n^O(1), where k is a parameter, isolating exponential growth in k; it is the parameterized analog of P.
FPTAS
An FPTAS, or fully polynomial-time approximation scheme, is the strongest guarantee in the approximation hierarchy, combining arbitrarily good accuracy with running time polynomial in input size and 1/ε.
FPV attack drone
An FPV attack drone is a single-use kamikaze drone piloted through goggles with a live camera feed, industrialized as a weapon in the Russia-Ukraine war.
FR3 (frequency range)
FR3 (Frequency Range 3) is the 3GPP upper mid-band spectrum from 7.125 to 24.25 GHz, between FR1 and FR2, and the leading candidate for 6G spectrum.
Frac pack
A frac pack is a well completion combining hydraulic fracturing with gravel packing in one operation, for sand control and stimulation, first used in the Gulf of Mexico in the early 1980s.
Frac spread
The frac spread is the difference between the value of natural gas liquids extracted from a gas stream and their value if sold as natural gas.
Fracking
Fracking, also called hydraulic fracturing, is a well stimulation technique first used commercially in 1949 that cracks tight rock to release oil and natural gas.
Fractal antenna
A fractal antenna is an antenna whose self-similar, fractal geometry lets one compact element resonate at multiple frequencies and fit a long electrical path into a small footprint.