FA

Arts and entertainment

• Fa (musical note)
• Fa Yuiry, a fictional character in Mobile Suit Zeta Gundam
• Fantasy Advertiser, later FA, UK fanzine
• Firearms (video game), 1998
• Fur Affinity, a furry fandom-centric art community website

Government, law and politics

• Fa (philosophy), a Chinese concept
• Falange Auténtica, a Spanish political party
• Finance Act
• Fisheries Agency, Taiwan

Languages and alphabets

• Fa (letter) of the Arabic abjad
• Faʼ language, Bantu language of Cameroon
• fa, ISO 639-1 code of the Persian language

Mathematics, science, and technology

• Factor analysis, a statistical method
• Fanconi anemia, a genetic disease
• Fayalite, an olivine mineral
• Femtoampere (fA)
• Fluorescein angiography, for eye examination
• Folic acid, a B vitamin
• Fractional anisotropy, degree of anisotropy
• Friedreich's ataxia, a genetic disease
• Nikon FA, a camera

Military

• Fedorov Avtomat, Russian one of the world's first operational automatic rifles
• Forschungsamt, Nazi German intelligence agency
• Frontal Aviation, Soviet Air Forces battlefield air defence
• Fleet Admiral, usually the highest rank of naval officers

Sport

• The Football Association, regulatory body, England
• First ascent, of a mountain
• Football association, a governing body for association football

Transport

• ALCO FA, a US locomotive
• Toyota FA, a truck
• Area forecast, in aviation
• Ferrocarriles Argentinos, Argentine railways
• Safair, a South African airline, IATA code
• NZR F^A Class, New Zealand locomotive class

Other uses

• Faculty of Arts or Intermediate of Arts, a high school diploma
• Fa (brand), of personal care products
• fa’ or Fall (unit), obsolete Scottish length unit
• Food Addicts in Recovery Anonymous (FA)
• Fa, a note in Solfège