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Frequency-modulated continuous-wave radar
Frequency-modulated continuous-wave radar, or FMCW radar, sweeps the transmitted frequency and derives range from the beat frequency with the echo, with simultaneous transmission giving Doppler velocity.
Frequency-shift keying
Frequency-shift keying (FSK) is a digital modulation scheme in which bits are sent as discrete frequency shifts of a carrier, used in modems, GSM, Caller ID, and Bluetooth.
Frequent-flyer program
A frequent-flyer program (FFP), or flyer miles, is an airline loyalty scheme where passengers earn points for travel and purchases, redeemable for flights, upgrades, and rewards.
Frequentis
Frequentis is an Austrian technology company founded in Vienna in 1947 that develops communication and information systems for safety-critical control centers in air traffic management, public safety, and transport.
Fresca
Fresca is a grapefruit-citrus, sugar-free, caffeine-free sparkling soft drink produced by The Coca-Cola Company, launched in 1967 after 1964 test marketing as its second low-calorie beverage after TaB.
Fresh Kills Landfill
Fresh Kills Landfill was a municipal landfill on Staten Island, New York City, operating from 1948 to 2001 and once the largest in the United States.
Fresh Thyme
Fresh Thyme Market, formerly Fresh Thyme Farmers Market, is a Midwest-based American chain of natural and organic grocery stores, operating about 70 stores in ten states.
Fretting
Fretting is micron-scale relative motion between nominally stationary surfaces in contact, caused by vibration or thermal cycling; it produces wear, corrosion, and fatigue life reduced to as little as one fifth.
Freudenberg Sealing Technologies
Freudenberg Sealing Technologies is a German sealing manufacturer headquartered in Weinheim, known for the Simmerring radial shaft seal developed in 1932 and for supplying the automotive industry.
FREYR Battery
FREYR Battery is a battery cell developer founded in Norway in 2018 to produce cells at Mo i Rana; it raised about $1 billion and rebranded as T1 Energy in 2025.
Freyssinet (company)
Freyssinet is a French specialist civil engineering company founded in 1943 by Eugène Freyssinet, best known for prestressed concrete and post-tensioning; it is part of Soletanche Freyssinet within VINCI Construction.
Friant Dam
Friant Dam is a concrete gravity dam on the San Joaquin River near Fresno, California, built 1939 to 1942; it impounds Millerton Lake and feeds the Central Valley Project.
Friant-Kern Canal
The Friant-Kern Canal is a 152-mile irrigation canal in Central California, running from Friant Dam on the San Joaquin River to the Kern River near Bakersfield.
Friar Park
Friar Park is a Victorian Gothic country house with ornamental gardens on the western edge of Henley-on-Thames, Oxfordshire, built from 1889 for Sir Frank Crisp and known as George Harrison's home.
Friction cone
A friction cone is the set of forces a contact can transmit without slipping, defined by Coulomb's limit that tangential force not exceed the friction coefficient times the normal force.
Friction drive
A friction drive is a mechanical power transmission that passes torque between smooth rotating surfaces pressed together by friction, with no gears, used in early automobiles and precision actuators.
Friction hysteresis
Friction hysteresis is the history dependence of friction force, where the force curve traces a closed loop whose area is dissipated energy, prominent in pre-sliding contact.
Friction pendulum bearing
The friction pendulum bearing, or Friction Pendulum System, is a seismic isolation device patented by Victor Zayas in 1987 that supports buildings on a spherical sliding surface.
Friction stir lap welding
Friction stir lap welding (FSLW) is a solid-state welding process in which a rotating tool joins overlapping metal sheets without melting them, used for thin sheets and dissimilar metals in vehicle and aircraft structures.
Friction stir processing
Friction stir processing is a solid-state metalworking method in which a rotating tool stirs metal below its melting temperature, refining grains and healing defects without changing the part's shape.
Friction stir spot welding
Friction stir spot welding (FSSW) is a solid-state process that joins overlapping metal sheets without melting. It is an alternative to resistance welding used in automotive and aerospace.
Friction stir welding
Friction stir welding (FSW) is a solid-state welding process invented at TWI in Cambridge, England, in 1991, in which a rotating tool joins metals without melting them.
Friction zone
The friction zone is the range of a motorcycle's clutch lever travel where the clutch is partially engaged, letting riders start smoothly and control speed.
Friden Calculating Machine Company
The Friden Calculating Machine Company, founded by engineer Carl Friden in Oakland, California, in 1934, became a leading calculator maker and introduced the first transistorized electronic desktop calculator, the EC-130, in 1964.
Fridtjof Nansen-class frigate
The Fridtjof Nansen class, or Nansen class frigate, is a class of five frigates of the Royal Norwegian Navy, built in Spain between 2000 and 2010.
Frieder Seible
Frieder Seible (born 1952) is a structural engineer known for seismic retrofit of bridges and blast-resistant design, and Dean Emeritus of UC San Diego's engineering school.
Friedrich C. Simmel
Friedrich C. Simmel is a professor of physics at the Technical University of Munich working in DNA nanotechnology, known for a nanoscale robotic arm controlled by electric fields.
Friedrich Koenig
Friedrich Koenig, born Johann Friedrich Gottlob Koenig, was a German printer and inventor whose steam-driven cylinder press printed The Times of London on 29 November 1814.
Friedrich von Hefner-Alteneck
Friedrich von Hefner-Alteneck (1845–1904) was a German engineer at Siemens & Halske who invented the drum armature in 1872 and the Hefner lamp, Germany's light standard.
Friedrich Voss
Friedrich Voss was a German civil engineer, born in Calvörde, best known for the Rendsburg High Bridge of 1913 and the canal bridges at Holtenau and Hochdonn.