AF

• A-F Records, Pittsburgh, Pennsylvania • Almost Family, US TV series ==Businesses and organizations==

European • ÅF, a Swedish technical consulting company • AF Gruppen, a construction company, Norway • Action Française, a French political movement • Air France, IATA code and stock symbol • Anarchist Federation (British Isles) International • Abercrombie & Fitch, A&F, US clothing shops • The Adaptation Fund, for climate change adaptation, UN • Adventist Forums, of Seventh-day Adventists Elsewhere • American Freightways, US trucking company, merged into FedEx Freight ==Language==

• Académie française, for French language matters • Alliance Française, promoting French language and culture • Acronym Finder, an online database • Afrikaans language (ISO 639-1 language code AF) • "...as fuck", meaning "very", in SMS language ==Medicine==

• Amniotic fluid • Atrial fibrillation, an abnormal heart rhythm ==Military==

• AF Guardian, a US Navy warplane • Air force • Armed forces • A US Navy hull classification symbol: Provisions store ship (AF) ==Names==

• Af, a Swedish nobiliary particle used in surnames ==Places==

• Afghanistan, by 2-letter ISO, FIPS 10-4, LOC MARC and obsolete NATO country code • .af, the top-level Internet domain for Afghanistan • Agra Fort railway station, Rawatpara, India ==Science and technology==

Acoustics and communications • Amplify-and-Forward, a scheme of relay channel • Alternative frequency • Audio frequency Units of measure • Acre-feet • Attofarad Visual arts • Autofocus, of a camera • Anisotropic filtering Other uses in science and technology • Af, the Köppen climate classification for a tropical rainforest climate • Across flats (A/F), a measure of hexagonal nut flat size • Advanced Format, large hard disk sectors • Anaerobic filter, a type of anaerobic digester • Arcuate fasciculus, a nerve bundle in the brain ==Other uses==

• Alabama and Florida Railway (reporting mark AF) • Anno Fascista, a year in the Italian Fascist calendar