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