F9
F9 stands for:
- DKW F9 , a passenger car planned for the late 1930s
- IFA F9 , a passenger car built from 1950 by VEB Automobilwerk Zwickau based on the designs of DKW
- Frontier Airlines (IATA code), an American airline
- Function key 9, on the computer keyboardF9
- the Fermat number F 9
- F9, the level 9 on the Fujita scale for the classification of tornadoes
- F9 , an abbreviation for a SpaceX launcher