AF

AF, aF, af or .af may stand for:

AF

Businesses, organizations and projects

* Air France, IATA airline designator for Air France
* Abercrombie & Fitch, an American based, international clothing retailer
* Alliance française
* A-F Records, a record label
* Acronym Finder
* Alabama and Florida Railway, the Association of American Railroads reporting mark for Alabama and Florida Railway.
* Adventist Forums, an organization of progressive Seventh-day Adventists
* AF Gruppen, a multi national construction and development company based in Norway

Health, technology and science

* Aunt Flo, a euphemism for menstruation.
* Atrial fibrillation, a form of cardiac arrhythmia
* Anaerobic filter, a type of anaerobic digester
* Anisotropic filtering
* Autofocus
* Audio frequency

Military

* AF Guardian, a warplane of the US Navy
* Air Force
* Armed Forces

Places

* American Fork, Utah
* Afghanistan, the 2-letter ISO (and obsolete NATO) country code for Afghanistan
* Midway Atoll JN-25

Pop culture and literature

* The Addams Family
* After Ford
* Akademi Fantasia
* Animal Farm
* Animal Forest
* Artemis Fowl

Other fiction

* AF or the Action Force, part of the European version of the G.I. Joe toy and comicbook universe

aF

* attofarad, an SI unit of electric capacitance

af

* acre-feet, the quantity of water that covers one acre to a depth of one foot; equal to 43,560 cubic feet or 325,851 gallons
* af, the ISO 639 code for the Afrikaans language.
* A shortening of afro, the hairstyle

.af

* .af is the ccTLD (Country code top-level domain) for Afghanistan