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

Arts and entertainment

  • 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

Politics

  • America First with Nicholas J. Fuentes, a political commentary show hosted by Nick Fuentes that started in 2017

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