China 
Africa 
- Flange
- Flange nut
- Flanging
- Flannel
- Flaperons
- Flaps
- Flaring
- Flash
- Flash animation
- Flash evaporation
- Flash file systems
- Flash fire
- Flash floods
- Flash memory
- Flash photolysis
- Flash point
- Flash smelting
- Flash-gas
- Flashbacks
- Flashing
- Flashover
- Flask
- Flat
- Flat bones
- Flat design
- Flat feet
- Flat file
- Flat map
- Flat module
- Flat organization
- Flat panel detectors
- Flat panel display
- Flat rate
- Flat roofs
- Flat topology
- Flat-file database
- Flat-panel detectors
- Flat-panel displays
- Flatness
- Flattening
- Flattening the curve
- Flatulence
- Flavan-3-ol
- Flavanone
- Flavin
- Flavin mononucleotide
- Flaviviridae
- Flavivirus
- Flavobacteria
- Flavobacteriia
- Flavodoxin
- Flavonoid biosynthesis
- Flavonoids
- Flavoproteins
- Flecainide
- Fleet
- Fleet management software
- Fleet management system
- Fleiss' Kappa
- Flettner rotor
- Flex sensor
- FlexRay
- Flexe
- Flexibility
- Flexibility method
- Flexible battery
- Flexible displays
- Flexible electronics
- Flexible intermediate bulk container
- Flexible manufacturing system
- Flexible organic light-emitting diode
- Flexible-fuel vehicle
- Flexicoil
- Flexion
- Flexoelectricity
- Flexor carpi ulnaris
- Flexor digitorum brevis
- Flexor digitorum longus
- Flexor digitorum profundus
- Flexor digitorum superficialis
- Flexor digitorum superficialis muscle
- Flexor hallucis brevis
- Flexor hallucis longus
- Flexor pollicis brevis
- Flexor pollicis longus
- Flexor retinaculum
- Flexural modulus
- Flexural rigidity
- Flexural strength
- Flexure
- Flibe
- Flicker
- Flicker fusion threshold
- Flicker noise
- Flight control surfaces
- Flight control system
- Flight dynamics
- Flight envelope
- Flight envelope protection
- Flight hours
- Flight instrument
- Flight level
- Flight paramedic
- Flight path
- Flight plan
- Flight planning
- Flight simulators
- Flight suits
- Flight surgeons
- Flight time
- Flinak
- Flint clay
- Flint glass
- Flip chart
- Flip chip
- Flip-flop
- Flit
- Float
- Float chamber
- Float glass
- Float switch
- Float valve
- Float-zone silicon
- Floaters
- Floating car data
- Floating cranes
- Floating floor
- Floating nuclear power plant
- Floating point
- Floating production storage and offloading
- Floating solar
- Floating wind turbine
- Floating-point arithmetic
- Floc
- Flocculant
- Flocculation
- Flood basalt
- Flood bypass
- Flood fill
- Flood forecasting
- Flood gun
- Flood pulse concept
- Flood risk assessment
- Flood stage
- Flood wall
- Floodgates
- Flooding
- Flooding algorithm
- Floodlights
- Floodplains