China 
Africa 
- Finite-state machines
- Finite-state transducers
- Finitely generated
- Finitely generated groups
- Finkelstein reaction
- Fins
- Fipronil
- Fire
- Fire alarm
- Fire clay
- Fire detection
- Fire doors
- Fire dynamics simulator
- Fire escapes
- Fire extinguishers
- Fire fighting foam
- Fire hoses
- Fire point
- Fire protection
- Fire protection engineering
- Fire pumps
- Fire regime
- Fire retardant
- Fire safety
- Fire sprinkler
- Fire suppression
- Fire suppression systems
- Fire triangle
- Fire whirls
- Fire-resistance rating
- Fire-setting
- Fire-tube boiler
- Firebox
- Firedamp
- Firefighting foam
- Firefly algorithm
- Firefly luciferase
- Firefly luciferin
- Firefox
- Fireproofing
- Fires
- Firestop
- Firewalls
- Firewater
- Firewood
- Fireworks
- Firing order
- Firing pin
- Firm power
- Firmware
- Firn
- First Solar
- First aid
- First derivative test
- First flush
- First fundamental form
- First isomorphism theorem
- First law of thermodynamics
- First moment of area
- First pass effect
- First pass yield
- First principles
- First responders
- First-countable
- First-order hold
- First-order logic
- First-pass metabolism
- First-pass yield
- Fischer assay
- Fischer esterification
- Fischer indole synthesis
- Fischer-Tropsch process
- Fisetin
- Fish
- Fish Canyon Tuff
- Fish kill
- Fish ladders
- Fish school search
- Fisher consistency
- Fisher information
- Fisher's equation
- Fissile
- Fissile material
- Fission barrier
- Fission product yield
- Fission products
- Fissures
- Fistulas
- Fit
- Fitbit
- Fitness
- Fitness approximation
- Fitness function
- Fitness landscape
- Fitness proportionate selection
- Fittings
- Fitts's law
- Five Whys
- Five-dimensional
- Five-dimensional space
- Five-number summary
- Five-point stencil
- Five-star
- Five-star hotel
- Five-year survival rate
- Fixation
- Fixed capital
- Fixed costs
- Fixed dose procedure
- Fixed effects
- Fixed effects model
- Fixed platforms
- Fixed point
- Fixed position
- Fixed wireless
- Fixed-dose procedure
- Fixed-function
- Fixed-pattern noise
- Fixed-point
- Fixed-point arithmetic
- Fixed-point iteration
- Fixed-point property
- Fixed-wing aircraft
- Fixtures
- Fjords
- Flaccid paralysis
- Flag
- Flag-tag
- Flagella
- Flagellates
- Flagellin
- Flags
- Flail chest
- Flakes
- Flame
- Flame arrester
- Flame detector
- Flame holder
- Flame lift off
- Flame lift-off
- Flame photometry
- Flame polishing
- Flame retardants
- Flame speed
- Flame spread
- Flame tests
- Flame treatment
- Flammability limit
- Flammable
- Flammable liquid