- free term of partial differential equation
- free transversality condition
- free universal algebra
- free variable
- free vector
- free vibration
- free vibration period of structure
- Frenet formula
- Frenet frames
- F-representation
- frequency
- frequency
- frequency catching
- frequency dictionary
- frequency division multiple access
- frequency division multiplexing technique
- frequency-domain condition of optimal regulator
- frequency-domain equalizer
- frequency-domain method for reducing order
- frequency domain representation of system uncertainty
- frequency histogram
- frequency histogram
- frequency histogram
- frequency inversion
- frequency normalization