- flat memory
- flicker "floor"
- flight map
- flight status
- flint chip
- flooding gun
- floor plug
- folding boom
- font size
- forced handoff
- forced start
- Foreign exchange
- foreseen interruption
- flow system
- flox
- fluorescent lifetime
- flutterer fading
- flying lead
- flywheel circuit
- FM modem
- focal spot
- flight hardware
- floating grid
- flow capacity
- fluidization principle
- fluoroscope
- flywheel effect
- FM carrier
- FM encoding
- FM network
- FM signal
- FM subcarrier
- folded dipole
- folded quad
- follow range
- font change
- footnote
- form mode
- formal system
- format check
- format code
- format control
- format definition
- format instruction
- format line
- format list
- format output
- format specification
- formatted
- formatted capacity
- formatted display
- formatted record
- formatting
- forward alarm
- forward amplifier
- forward characteristic
- forward filt
- forward path
- forward power
- forward release
- forward scatter
- forward scattering
- forward signal
- forward skirt
- fouling point
- Fourier transform
- Fourier transformation
- Fractional T1
- frame
- frame aerial
- frame aligner
- frame alignment
- frame amplifier
- frame coil
- frame duration
- frame efficiency
- frame frequency
- frame grid
- frame information
- frame length
- frame marking
- frame period
- frame signal
- frame slipping
- frame store
- frame structure
- frame synchronization
- frame synchronizer
- frame time
- framing information
- framing pattern
- framing structure
- franc area
- franking filter
- Franklin antenna
- fraudulent use
- fraunhofer region
- free atmosphere
- free balloon
- free electron