# ASA

ASA as an abbreviation or initialism may refer to:

## Biology and medicine

* Accessible surface area of a biomolecule, accessible to a solvent
* Acetylsalicylic acid, aspirin
* Advanced surface ablation, refractive eye surgery
* Anterior spinal artery, the blood vessel which supplies the anterior portion of the spinal cord
* Antisperm antibodies, antibodies against sperm antigens
* Argininosuccinic aciduria, a disorder of the urea cycle
* ASA physical status classification system, rating of patients undergoing anesthesia

## Education and research

* African Studies Association of the United Kingdom
* African Studies Association
* Alandica Shipping Academy, Åland Islands, Finland
* Albany Students' Association, at Massey University, Auckland, New Zealand
* Alexander-Smith Academy, in Houston, Texas
* Alpha Sigma Alpha, U.S. national sorority
* American Society for Aesthetics, philosophical organization
* American Student Assistance, national non-profit organization
* American Studies Association
* Arizona School for the Arts
* Armenian Sisters Academy
* Association of Social Anthropologists
* Astronomical Society of Australia
* Austrian Studies Association

## Organizations

* Acoustical Society of America, international scientific society
* Advertising Standards Authority (disambiguation), advertising regulators in several countries
* American Scientific Affiliation, an organization of Christians in science
* American Society of Agronomy
* American Society of Anesthesiologists
* American Society of Appraisers
* American Sociological Association
* American Staffing Association
* American Standards Association, a former name of the American National Standards Institute
* American Statistical Association
* American Synesthesia Association
* Americans for Safe Access, marijuana law reform group
* Association for Social Advancement, microfinance institution, Bangladesh
* Association for the Study of Abortion
* Association of Scouts of Azerbaijan
* Association of Southeast Asia
* Australian Submarine Agency
* Australian Society of Authors
* Australian Space Agency
* Austrian Service Abroad
* Autism Society of America
* United States Army Security Agency

## Sports

* Agremiação Sportiva Arapiraquense, Brazilian soccer club
* Alliance Sport Alsace, French basketball club
* Amateur Softball Association, former name of the governing body now known as USA Softball
* Amateur Swimming Association, former name of Swim England
* American Sailing Association
* American Samoa, IOC country code
* American Speed Association, motorsports sanctioning body
* American Sportscasters Association
* Arizona Soccer Association
* Athletics South Africa, the national governing body for the sport of athletics in South Africa
* Atlético Sport Aviação, Angolan multisports club
* United States Adult Soccer Association

## Transportation

* ASA (automobile), Italian marque of automobiles (Autocostruzioni Società per Azioni)
* ASA Aluminium Body, Argentinian manufacturer of replicas of sports cars
* Aeropuertos y Servicios Auxiliares, Mexican airport operator
* African Safari Airways, airline company based in East Africa
* Air services agreement, bilateral agreement to allow international commercial air transport services between signatories
* Atlantic Southeast Airlines, in Atlanta area, Georgia
* Airline Superintendents Association, of Trinidad & Tobago
* Airservices Australia, air traffic management and related services provider for Australia
* The International Civil Aviation Organization's code for Alaska Airlines

## Other

* ASA ("American Standards Association") a measure of film speed in photography, later replaced by the ISO standard
* Acrylonitrile styrene acrylate, a thermoplastic used for 3D printing and in the auto industry
* Adaptive simulated annealing, optimization algorithm
* Cisco ASA (Adaptive Security Appliances)
* Allied States of America, a fictional American nation in the television show Jericho
* Allmennaksjeselskap, the designation for a Norwegian public limited company
* Anti-Soviet agitation, a criminal offense in the Soviet Union
* ASA carriage control characters, a system used for controlling mainframe line printers
* Assistant state's attorney, a title for attorneys working in the state's attorney's office in the United States
* As-salamu alaykum, a greeting in Arabic that means "peace be upon you"
* Auditory scene analysis, a proposed model for the basis of auditory perception