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 The African Studies Association of the United Kingdom (ASAUK) formed in 1963 "to advance African studies, particularly in the United Kingdom, by providing facilities for the interchange of information and ideas and the co-ordination of activities ...

* 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 The Association of Social Anthropologists of the UK and Commonwealth is a learned society in the United Kingdom dedicated to promoting the academic discipline of social anthropology. It is a member of the Academy of Social Sciences The Academy o ...

* Astronomical Society of Australia * Austrian Studies Association

Organizations

* Acoustical Society of America, international scientific society * Advertising Standards Authority (disambiguation), advertising regulators in several countries * Aid to Southeast Asia, a non-governmental organization *

American Scientific Affiliation The American Scientific Affiliation (ASA) is a Christian religious organization of scientists and people in science-related disciplines. The stated purpose is "to investigate any area relating Christian faith and science." The organization publi ...

, an organization of Christians in science * American Society of Agronomy * American Society of Anesthesiologists * American Society of Appraisers *

American Sociological Association The American Sociological Association (ASA) is a non-profit organization dedicated to advancing the discipline and profession of sociology. Founded in December 1905 as the American Sociological Society at Johns Hopkins University by a group of fif ...

* American Staffing Association *

American Standards Association The American National Standards Institute (ANSI ) is a private non-profit organization that oversees the development of voluntary consensus standards Standardization or standardisation is the process of implementing and developing techn ...

, 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 The Association for the Study of Abortion (ASA) was an American organization founded around 1965 dedicated to the study of abortion and advocacy for the liberalization of abortion law. Its founding members included the obstetrician-gynecologists A ...

* Association of Scouts of Azerbaijan * Association of Southeast Asia * Australian Society of Authors *

Australian Space Agency The Australian Space Agency is an agency under the Australian Government responsible for the development of Australia's commercial space industry, coordinating domestic activities, identifying opportunities and facilitating international spac ...

* Austrian Service Abroad *

Autism Society of America The Autism Society of America (ASA) was founded in 1965 by Bernard Rimland and Ivar Lovaas together with Ruth C. Sullivan and a small group of other parents of children with autism. Its original name was the National Society for Autistic Children ...

* 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 Atlético Sport Aviação, best known as ASA, is a football club from Luanda, Angola. The club was founded in 1953 by a group of workers from TAAG's predecessor DTA. Mr. Jacinto Medina was the first chairman. Before Angola's independence, the c ...

, 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 An air transport agreement (also sometimes called an air service agreement or ATA or ASA) is a bilateral agreement to allow international commercial air transport services between signatories. The bilateral system has its basis under the Chicago ...

, bilateral agreement to allow international commercial air transport services between signatories * Atlantic Southeast Airlines, in Atlanta, Georgia *

Airline Superintendents Association The Airline Superintendents Association is a trade union in Trinidad and Tobago with most of its members in the former airline of BWIA. See also * List of trade unions This is a list of trade unions and union federations by country. Interna ...

, of Trinidad & Tobago *

Airservices Australia Airservices Australia is an Australian Government owned corporation, responsible for providing safe, secure, efficient and environmentally responsible services to the aviation industry within the Australian Flight Information Region (FIR). S ...

, air traffic management and related services provider for Australia * The International Civil Aviation Organization's code for Alaska Airlines

Other

* ASA, a measure of film speed in photography, later replaced by the ISO standard * Acrylonitrile styrene acrylate, a plastic polymer * 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 Anti-Soviet agitation and propaganda (ASA) (russian: антисове́тская агита́ция и пропага́нда (АСА)) was a criminal offence in the Soviet Union. To begin with the term was interchangeably used with counter-revolu ...

, a criminal offense in the Soviet Union * ASA carriage control characters, a system used for controlling mainframe line printers *

Assistant state's attorney In the United States, a district attorney (DA), county attorney, state's attorney, prosecuting attorney, commonwealth's attorney, or state attorney is the chief prosecutor and/or chief law enforcement officer representing a U.S. state in a loc ...

, 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 In perception and psychophysics, auditory scene analysis (ASA) is a proposed model for the basis of auditory perception. This is understood as the process by which the human auditory system organizes sound into perceptually meaningful elements. T ...

, a proposed model for the basis of auditory perception