- YF stands for Yellow Fever (disease)
- YF stands for Your Friend
- YF stands for Youth Fellowship
- YF stands for Yorkshire Forward (UK, regional development agency)
- YF stands for Prototype Fighter (US Air Force aircraft designation)
- YF stands for Covered Lighter (Self-Propelled; US Navy ship designation)
- YF stands for Range Tender (US DoD)
- YF stands for Provision Store Lighter (US DoD)
- YF stands for District Lighter, Covered (US Navy)
Abbreviations And Their Meaning