AF
- af – (s) Afrikaans language (ISO 639-1 code)
- aF – (s) Attofarad
- AF
- (s) Afghanistan (FIPS 10-4 country code; ISO 3166 digram)
- (i) Air Force
- AFA
- (i) U.S. Air Force Academy
- Asociación del Fútbol Argentino (Spanish, "Argentine Football Association")
- AFAIC – (i) As Far As I'm Concerned
- AFAICT – (i) As Far As I Can Tell
- AFAIK – (i) As Far As I Know
- AFAIR – (i) As Far As I Remember/Recall
- AFATDS – (i) Advanced Field Artillery Tactical Data System
- AFC
- (i) American Football Conference
- Asian Football Confederation
- AFCEA – (i) Armed Forces Communications and Electronics Association
- AFDB – (i) African Development Bank
- AFES – (i) Automatic Fire Extinguishing System
- AFG – (s) Afghanistan (ISO 3166 trigram)
- AFI
- (s) French Territory of the Afars and Issas (ISO 3166 trigram; obsolete since 1977)
- (i) "Agencia Federal de Investigaciónes" (México)
- AFIS
- (a) Automated Fingerprint Identification System
- American Forces Information Service
- AFIST – (i) Abrams Full Crew Interactive Skills Trainer
- AFJ – (i) April Fool's Joke
- AFK – (i) Away From Keyboard (Internet chat abbreviation)
- AFL
- (i) American Federation of Labor
- American Football League — either the 1960s league that merged into the National Football League, or one of several other leagues of American football
- Arena Football League
- Australian Football League
- AFL-CIO – (i) American Federation of Labor – Congress of Industrial Organizations
- AFLAC – (a) American Family Life Assurance Company of Columbus
- AFM – (i) Army Field Manual (UK; the U.S. more frequently uses just FM) – Atomic Force Microscope – Aviation Fleet Maintenance
- AFN – (s) Afghani (ISO 4217 currency code)
- AFO – (i) Association of Field Ornithologists
- AFOSR – (i) U.S. Air Force Office of Scientific Research
- AFP – (a) Australian Federal Police
- AFQT – (i) Armed Forces Qualification Test
- afr – (s) Afrikaans language (ISO 639-2 code)
- AFRC – (i) Air Force Reserve Command
- AFRL – (i) Air Force Research Laboratory
- AFROTC – (i) Air Force Reserve Officer Training Corps
- AFRRI – (i, U.S.) Armed Forces Radiobiology Research Institute
- AFRTS – (i) Armed Forces Radio and Television Service
- AFS
- (i) Active Front Steering
- Air Facility Sub-System
- Amniotic Fluid-derived Stem cell
- AFS&A or AFSA – (i) U.S. Air Force Studies and Analysis
- AFSC
- (i) U.S. Air Force Staff College (obsolete; replaced with JFSC)
- U.S. Air Force Systems Command
- AFSCN – (i) U.S. Air Force Satellite Control Network
- AFSPC – (i) Air Force Space Command
- AFT – American Farmland Trust
- AFV – (i) armoured fighting vehicle
- AFWA
- (a) Air Force Weather Agency
- Association of Fish and Wildlife Agencies
Read more about this topic: List Of Acronyms And Initialisms: A