ASA as an abbreviation or initialism may refer to:

Biology and medicine

Accessible surface area The accessible surface area (ASA) or solvent-accessible surface area (SASA) is the surface area of a biomolecule that is accessible to a solvent. Measurement of ASA is usually described in units of square angstroms (a standard unit of measurement ...

of a biomolecule, accessible to a solvent *

Acetylsalicylic acid Aspirin, also known as acetylsalicylic acid (ASA), is a nonsteroidal anti-inflammatory drug (NSAID) used to reduce pain, fever, and/or inflammation, and as an antithrombotic. Specific inflammatory conditions which aspirin is used to treat inc ...

, aspirin *

Advanced surface ablation Photorefractive keratectomy (PRK) and laser-assisted sub-epithelial keratectomy (or laser epithelial keratomileusis) (LASEK) are laser eye surgery procedures intended to correct a person's vision, reducing dependency on glasses or contact lenses. ...

, refractive eye surgery *

Anterior spinal artery In human anatomy, the anterior spinal artery is the artery that supplies the anterior portion of the spinal cord. It arises from branches of the vertebral arteries and courses along the anterior aspect of the spinal cord. It is reinforced by sever ...

, the blood vessel which supplies the anterior portion of the spinal cord *

Antisperm antibodies Antisperm antibodies (ASA) are antibodies produced against sperm antigens. Types Antisperm antibodies are immunoglobulins of IgG, IgA, and/or IgM, which are directed against sperm antigens. ASA can be detected in ejaculate, cervical mucus, ...

, antibodies against sperm antigens *

Argininosuccinic aciduria Argininosuccinic aciduria is an inherited disorder that causes the accumulation of argininosuccinic acid (also known as "ASA") in the blood and urine. Some patients may also have an elevation of ammonia, a toxic chemical, which can affect the nervo ...

, a disorder of the urea cycle *

ASA physical status classification system The ASA physical status classification system is a system for assessing the fitness of patients before surgery. In 1963 the American Society of Anesthesiologists (ASA) adopted the five-category physical status classification system; a sixth catego ...

, 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 * Aid to Southeast Asia, a non-governmental organization * 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 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 transport agreement, Air services agreement, bilateral agreement to allow international commercial air transport services between signatories * Atlantic Southeast Airlines, in Atlanta, 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, a measure of Film speed#ASA, 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, a criminal offense in the Soviet Union * ASA carriage control characters, a system used for controlling mainframe line printers * District attorney, 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

Biology and medicine

Education and research

Organizations

Sports

Transportation

Other

See also