CAS
CAS may refer to:
Organisations
- California Academy of Sciences, a major natural history museum and center for scientific research
- Career Academies of Seminole, a program run by Pinellas County Schools in Florida
- Casablanca American School, a coed private prep school in Casablanca, Morocco
- Casualty Actuarial Society, a professional society of actuaries in the United States
- Centre for Astrophysics and Supercomputing, a research center at Swinburne University in Australia
- Chemical Abstracts Service, a division of the American Chemical Society which produces bibliographic and chemistry databases
- Chinese Academy of Sciences, the national academy for the natural sciences of China
- Combined Associated Schools, an association of private schools in Sydney, Australia
- Contemporary Art Society, UK
- Contemporary Art Society (Australia)
- Contemporary Art Society, Adelaide, later the Contemporary Art Centre of South Australia
- Contemporary Arts Society, Canada
- Court of Arbitration for Sport, an international arbitration body set up to settle disputes related to sports
- Children's Aid Society, a private charity in New York City
- Children's Aid Society (Ontario), a Canadian government organization
- Christchurch Adventist School, a Seventh-day Adventist school in New Zealand
- Civil Aid Service, a Hong Kong Civil Aid agency
- Cinema Audio Society, an association of sound professionals in the motion picture and television industry
- Council for the Advancement of Standards in Higher Education, a consortium of professional student development organizations in higher education
- Connecticut Association of Schools, the governing body for secondary school athletics and other competitions in Connecticut, US
- Czech Academy of Sciences, formerly Academy of Sciences of the Czech Republic
- Český atletický svaz, Czech Athletics Federation
- Comite d'action socialiste - Socialist Action Committee, a French Resistance network
Computing
- CAS latency (column address strobe or column address select), a latency in reading computer memory
- Central Authentication Service, a single sign-on protocol
- Cloud Analytic Services, a server that provides the cloud-based, run-time environment for data management and analytics with SAS (software)
- Code Access Security in the Microsoft .NET framework
- Compare-and-swap, a special CPU instruction, an atomic instruction used in multithreading to achieve synchronization
- Computer algebra system, a software program that facilitates symbolic mathematics
- Conditional access system, a technology used in set-top boxes to allow conditional viewing of TV channels
- Content-addressable storage, a data storage mechanism
- Copyright Alert System, also known as the 'six strikes' program
- Cycle-accurate simulator, a computer program that simulates a microarchitecture in a cycle-accurate manner
Science and medicine
- Calcium sulfide (CaS), a chemical compound
- Coronary artery spasm (CAS)
- Carotid artery stenting, endovascular surgery of the carotid artery
- Cassiopeia (constellation) (Cas), standard astronomical abbreviation
- Cells Alive System
- Chemical Abstracts Service, a division of the American Chemical Society which produces bibliographic and chemistry databases
- CAS Registry Number, unique numerical identifiers for chemical substances
- Cognitive Assessment System, an academic assessment test given to children
- Complex adaptive system, special cases of complex systems
- Computer Aided Surgery (journal)
- Computer-assisted surgery, use computer technology in surgery
- Critical animal studies, an interdisciplinary field in the humanities and social sciences
- Critical autism studies
- Hartley kernel, which also is known as the cosine and sine function
- Cis-abienol synthase, an enzyme
- CRISPR-associated (Cas) proteins, involved in the prokaryotic immune system and genome editing
- CAS parameters, an image analysis method typically used in astronomy
- Childhood apraxia of speech, a developmental speech disorder
Entertainment and sports
- Calling All Stations, the fifteenth and final studio album by Genesis
- Cigarettes After Sex, an American ambient pop band
- Classic Arts Showcase, an American television channel promoting the fine arts
- Cowboy action shooting, a competitive shooting sport
Military
- Chief of the Air Staff, the professional head of the air force in some Commonwealth nations
- Close air support, a military tactic whereby aircraft are utilized to support friendly forces
- Combat armor suit, a specialized suit that provides powered armor
- Cost Accounting Standards, accounting requirements for larger defense and government contractors (United States)
Aerospace
- Calibrated airspeed, the airspeed shown by an airspeed indicator
- Covenant Aviation Security, LLC, a company that provides security services to the aviation industry
- Crew-alerting system, the cockpit computer that issues system warnings to pilots
- Casablanca–Anfa Airport (IATA code)
Transport
- Castleton railway station, Manchester, England (National Rail station code)
- Chicago, Attica and Southern Railroad, a former line in the American states of Indiana and Illinois
Other uses
- Certificate of Advanced Study, a postgraduate certificate
- Channel-associated signaling, in telecommunications
- Citizens Advice Scotland, the umbrella organisation for Citizens Advice Bureaux in Scotland
- Clark Ashton Smith (1893–1961), American author and artist
- Collision avoidance system, an automobile safety system
- Controlled American source, a placeholder term used by the Central Intelligence Agency in classified documents to avoid disclosure of specific locations, operations, activities, or individuals
- Controlled atmosphere stunning, a method for slaughtering animals
- County Antrim Shield, football tournament in Northern Ireland
- Creativity, activity, service, the community service aspect of the International Baccalaureate Diploma Programme