FFR
- FC Fazisi Racha
- Factory Five Racing
- Falster Foot Regiment
- Fast Food Rockers
- Federal funds rate
- Fellowship of the Faculty of Radiology
- Fischer Air
- Fit for Rivals
- Fitted For Radio
- Five Finger Rapids
- Flathead Forest Reserve
- For Future Reference
- Fractional flow reserve
- Franciscan Friars of the Renewal
- Franconian Forest Railway
- French First Republic
- French Rugby Federation
- French Rugby League Federation
- Frequency following response
- Friendly Fire Recordings
- Frontier Force Regiment
- Frontline Freelance Register
- Russian Fencing Federation