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Fleet Air Arm
The Fleet Air Arm, forerun by the Royal Naval Air Service, is the aviation branch of the British Royal Navy, formed in the late 1930s and based at RNAS Yeovilton.
Fleet Air Reconnaissance Squadron One (VQ-1)
Fleet Air Reconnaissance Squadron One (VQ-1), nicknamed the World Watchers, is the US Navy's shore-based signals reconnaissance squadron, flying the EP-3E Aries II since 1991.
Fleet carrier
A fleet carrier, also called a fleet aircraft carrier, is the largest class of aircraft carrier, built to operate with a navy's main battle fleet rather than escort convoys.
Fleet management
Fleet management is the administration of a company's motor vehicles and mobile assets, covering maintenance, fuel, driver scheduling, safety, compliance, and disposal, today relying heavily on telematics.
Fleet Replacement Squadron
A Fleet Replacement Squadron (FRS), also called a Replacement Air Group or RAG, is a US Navy or Marine Corps unit that trains aviators on their assigned front-line aircraft.
Fleet submarine
A fleet submarine is a long-range, ocean-going submarine designed to scout ahead of a surface battle fleet, reaching its mature form in American World War II classes.
Flemish bond
Flemish bond, also called Dutch bond, is a brickwork pattern in which each course alternates headers and stretchers, giving a checker-like face favored from the 17th century onward.
Flender (gearbox manufacturer)
Flender GmbH is a German manufacturer of industrial gear units, couplings, and generators, founded in 1899 and headquartered in Bocholt, supplying wind turbine drivetrains under its Winergy brand.
Fleshlight
Fleshlight is a brand of male sex toy, a soft sleeve inside a flashlight-shaped case, patented in 1998 and sold by Interactive Life Forms of Austin, Texas.
FLET'S Hikari
FLET'S Hikari (フレッツ光) is the fiber-optic broadband access service provided by NTT East and NTT West across Japan, sold with separate Internet provider contracts since 2001.
Fletcher-class destroyer
The Fletcher-class destroyer was a class of 175 United States Navy destroyers introduced in 1942 that formed the core of the Navy's destroyer force in the Pacific war.
Flettner rotor
A Flettner rotor, also called a rotor sail, is a spinning vertical cylinder mounted on a ship that produces thrust through the Magnus effect, cutting fuel use by 3–15%.
Flex Ethernet
Flex Ethernet (FlexE) is an Optical Internetworking Forum transport technology, standardized since 2016, that decouples Ethernet MAC rates from physical layer rates through bonding, sub-rating, and channelization.
Flex Ltd.
Flex Ltd., formerly known as Flextronics, is a Singapore-incorporated electronics manufacturing services and supply chain company headquartered in Austin, Texas. Founded in 1969, it reported $27.9 billion in net sales for fiscal 2026.
Flex room
A flex room is a room in a home built without a fixed purpose, letting owners convert it over time between uses like office, gym, or guest bedroom.
Flex-Foot
The Flex-Foot is a carbon-fiber energy-storing prosthetic foot with a C-shaped keel, invented by American amputee Van Phillips and introduced commercially in 1984.
Flexbox
Flexbox (the CSS Flexible Box Layout module) is a one-dimensional CSS layout model for arranging items in rows or columns, letting them grow or shrink to fit available space.
Flexera
Flexera is a privately held American software company headquartered in Itasca, Illinois, selling license management, software asset management, FinOps, and vulnerability intelligence products to more than 50,000 customers.
FlexFoil
FlexFoil is a gapless, shape-morphing wing trailing-edge flap developed by FlexSys Inc. of Ann Arbor, Michigan, and flight-tested by NASA and the Air Force Research Laboratory from 2014 to 2015.
Flexible AC transmission system
A flexible AC transmission system (FACTS) is an AC transmission system with power electronic-based static controllers that enhance controllability and increase power transfer capability, a definition given by the IEEE.
Flexible Collision Library
The Flexible Collision Library (FCL) is an open-source C++ library for collision detection, distance computation, and continuous collision detection, introduced by University of North Carolina researchers in 2012.
Flexible coupling
A flexible coupling is a mechanical device connecting two rotating shafts that transmits torque while accommodating angular, parallel, and axial misalignment; common types include gear, disc, grid, and elastomeric couplings.
Flexible job shop scheduling
Flexible job shop scheduling is an NP-hard optimization problem where each operation can be assigned to any machine in a given subset, with makespan the usual objective.
Flexible manufacturing system
A flexible manufacturing system (FMS) is a computer-controlled system of CNC machine tools, robots, and automated material handling that produces varied parts with little manual intervention.
Flexible OLED
A flexible OLED is an organic light-emitting diode display built on a bendable plastic, such as polyimide, or ultra-thin glass substrate, first mass-produced for smartphones in 2013.
Flexible perovskite solar cell
A flexible perovskite solar cell is a thin-film photovoltaic device made on bendable substrates such as plastic, metal foil, or ultrathin glass, with single-junction efficiencies now above 23%.
Flexible perovskite solar modules
Flexible perovskite solar modules are photovoltaic modules that integrate multiple perovskite sub-cells on bendable plastic or metal foil substrates, offering high efficiency, low weight, and roll-to-roll manufacturing compatibility.
Flexible post
A flexible post, commonly called a flexible delineator post or flexpost, is a reboundable polyurethane traffic post marking lanes and protected bike lanes that bends when struck and springs upright.
Flexible printed circuit
A flexible printed circuit, also called an FPC or flex PCB, is circuitry printed on a bendable polyimide film instead of a rigid board, used in phones, wearables, and cars.
Flexible shaft
A flexible shaft is a rotating mechanical element that transmits torque between misaligned points, using a helically wound steel wire core turning inside a fixed casing.