F3, F03, F.III, F.3, F 3 or F-3 may refer to: - F3 class, a project name for an upcoming class of Norwegian Cruise Lines mega-cruise ships
- F-3 Demon, a carrier based jet fighter of the United States Navy
- F3 (font format), created by Folio, Inc.
- F3 (language), the working name for JavaFX Script, a scripting language
- F 3 Malmslätt, a former Swedish Air Force unit
- F3 (Zimbabwe), a road in Zimbabwe
- EMD F3, a North American cab-style diesel locomotive introduced in 1945
- Felixstowe F.3, a 1917 British First World War flying boat
- Fokker F.III, a 1921 Dutch single-engined high-winged monoplane aircraft
- Forsmark 3, unit 3 at Forsmark Nuclear Power Plant, Sweden
- Hannover F.3, a World War I German prototype escort fighter
- HMS F3, a British F class submarine
- HMS Cossack (F03), a 1937 British Royal Navy Tribal-class destroyer
- Motorola Motofone F3, a mobile phone
- Nikon F3, a professional SLR camera
- RAF Tornado F3
- PRR F3, an American PRR 2-6-0 steam locomotive
- Taito F3 System
- USS F-3 (SS-22), F-class submarine of the United States Navy
F3 may refer to: - F³ (Frantic, Frustrated and Female), a hentai anime series
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