AF

AF, af, Af, etc. may refer to:

Arts and media

• Autofocus, of a camera
• A-F Records, Pittsburgh, Pennsylvania
• Almost Family, US TV series
• America First with Nicholas J. Fuentes, a political commentary show hosted by Nick Fuentes that started in 2017

Places, transportation, and military

• Afghanistan, by 2-letter ISO, FIPS 10-4, LOC MARC and obsolete NATO country code
• Agra Fort railway station, Rawatpara, India
• Alabama and Florida Railway (reporting mark AF)
• American Freightways, US trucking company, merged into FedEx Freight
• Air France, IATA code and stock symbol
• AF Guardian, a US Navy warplane
• A US Navy hull classification symbol: Provisions store ship (AF)
• Air force
• Armed forces

Biology, ecology, and politics

• Amniotic fluid
• Atrial fibrillation, an abnormal heart rhythm
• Arcuate fasciculus, a nerve bundle in the brain
• Anaerobic filter, a type of anaerobic digester
• Af, the Köppen climate classification for a tropical rainforest climate
• The Adaptation Fund, for climate change adaptation, UN
• Action Française, a French political movement
• Anarchist Federation (British Isles)
• America First, a political slogan
• Anno Fascista, a year in the Italian Fascist calendar

Language, telecommunications, and computing

• Alliance Française, promoting French language and culture
• Académie française, for French language matters
• Afrikaans language (ISO 639-1 language code AF)
• Acronym Finder, an online database
• "...as fuck", meaning "very", in SMS language
• Amplify-and-Forward, a scheme of relay channel
• Alternative frequency
• Audio frequency
• .af, the top-level Internet domain for Afghanistan
• Anisotropic filtering
• Advanced Format, large hard disk sectors

Engineering and industry

• ÅF, a Swedish technical consulting company
• AF Gruppen, a construction company, Norway
• Across flats (A/F), a measure of hexagonal nut flat size

Other uses

• Abercrombie & Fitch, A&F, US clothing shops
• Adventist Forums, of Seventh-day Adventists
• Af, a Swedish nobiliary particle used in surnames
• Acre-feet
• Attofarad