Area forecast (aviation)
Certified mail (Scott catalog prefix)
Fa, a municipality in France
Factor analysis
Faculty assistant
Falkland Islands (FIPS country code)
Fame Academy
Family assistance
Fanconi anemia
Farm Aid
Farmer's Almanac
Fatty acid
Feasibility analysis
Federal agent
Felonious assault
Fenton's Approximation
Fibonacci Association
Field artillery
Fiery Avenger
Filiae Amatissimae (Lat. "To My Beloved Daughter")
Final approach (aviation)
Final art
Finanzamt (Germany)
Fine arts
First aid
First ascent (climbing)
Fixed assets
Flight attendant
Fluorescein angiogramic angiography
Fluorescent antibody
For Auction
Football Association (England)
Frankford Arsenal
Fredericksburg Academy
Friederich's Ataxia
Functional assessment
Fuck all (used in the expression Sweet FA, which originally stood for Sweet Fanny Adams)