English abbreviations from fxs to fyip
- FXS (Fragile X syndrome)
- FXX (Metropolitan France (ISO 3166 trigram; obsolete 1997))
- FXXI (Force Twenty One)
- FXXITP (Force XXI Training Program)
- FXY (Forest City Municipal Airport)
- FY (fiscal year)
- FYA (For Your Agenda)
- FYBP (Fiscal Year Base Plan)
- FYC (Faithful Youth Challengers)
- FYD (Follow Your Dream)
- FYDP (Five-Year Defense Plan (U.S.))
- FYDS (Flight director/ Yaw damper system)
- FYE (For Your Eyes)
- FYEO (For Your Eyes Only)
- FYFA (Fairfax Youth Fastpitch Association)
- FYI (For Your Information)
- FYI&A (For Your Information and Action)
- FYIAP (Five Year Interoperability Assurance Plan)
- FYIP (Fairbury Youth Involvement Program)