CAC

• California Arts Council, an agency for advancing California through the arts and creativity
• Campbelltown Arts Centre, multidisciplinary contemporary arts centre south-west of Sydney, Australia
• Comics Arts Conference, a scholarly conference associated with Comic-Con International
• Contemporary Arts Center, an art museum in Cincinnati, Ohio
• Ciutat de les Arts i les Ciències (City of Arts and Sciences), a cultural and architectural complex in Valencia, Spain

• Central Arbitration Committee
• CAC 40, a French stock market index
• Cotation Assistée en Continu, an electronic trading system used at the French stock exchange
• Capital account convertibility, a fiscal policy based on conducting transactions of local financial assets into foreign financial assets freely
• Collective action clause, a clause that allows a supermajority of bondholders to agree a debt restructuring that is legally binding on all holders of the bond
• Corporate Affairs Commission, Nigeria, a body that regulates companies in Nigeria
• Customer acquisition cost, the amount of money a business needs to spend to get an additional customer

• Call Aircraft Company, an aircraft manufacturer in the United States
• Certified Acceptance Corporation, a coin grading service
• Cessna Aircraft Company, a defunct American general aviation aircraft manufacturing corporation
• Chengdu Aircraft Corporation, an aircraft manufacturer in China
• Chugach Alaska Corporation, an Alaska Native regional corporation
• Colonial Ammunition Company, a New Zealand ammunition company
• Commonwealth Aircraft Corporation, an Australian aircraft manufacturer
• Conquest Airlines (ICAO airline designator)
• Consolidated Aircraft Corporation
• Copa Airlines Colombia

Carrington American Central [[Copper Australia Courier]] Cambridge Aero Coorporation

• Cairo American College, a school in Cairo, Egypt
• Coomera Anglican College, a school in Queensland, Australia
• Carmel Adventist College, a school in Western Australia, Australia
• Christian Alliance College, a middle school in Tuen Mun, Hong Kong

• U.S. Army Coast Artillery Corps, a U.S. Army corps
• Combined Action Company, a joint unit of the Combined Action Program of U.S. Marines and South Vietnamese Regional Forces during the Vietnam war
• United States Army Combined Arms Center, a component of the Training and Doctrine Command
• Canadian Armoured Corps, renamed in 1945 to Royal Canadian Armoured Corps
• Canadian Aviation Corps, the predecessor to the Royal Canadian Air Force
• Common Access Card, a U.S. military identification card
• Colombian armed conflict (1964–present), an internal war in Colombia

• Campaign Against Censorship, a UK pressure group that opposes censorship
• Central Advisory Commission, a political commission of the People's Republic of China
• Central Advisory Council, a body set up by the Imperial Japanese Army in the occupied Dutch East Indies
• Central Asian Commonwealth, an organization later renamed to Organization of Central Asian Cooperation
• Coalition against Communalism, a San Francisco Bay area organization concerned with communalism in South Asia
• Constitutional Accountability Center, a Washington, D.C. think tank
• CPSU Central Auditing Commission, an organ of the Communist Party of the Soviet Union
• Christians Against the Coup, an Egyptian political movement opposing the recent 2013 coup d'état in Egypt
• Christ Apostolic Church
• Church at Charlotte, an evangelical free church in Charlotte, NC
• Cyberspace Administration of China, a government agency of the People's Republic of China

• Calcium carbide, a chemical compound
• Call Admission Control, a concept in voice over IP networking
• Air carbon arc cutting, an arc cutting process
• Citric acid cycle, a series of chemical reactions in cells that use oxygen in respiration
• Codex Alimentarius Commission, an organisation which maintains food standards
• Common Access Card, smart card used by the Active Duty United States Defense personnel
• Criteria air contaminants, a group of air pollutants
• Charge air cooler, part of an internal combustion engine
• Carrier access code
• Система Аварийного Спасения (transliteration from the Russian alphabet: Sistema Avariynogo Spaseniya, SAS), the Soyuz launch escape system
• CAC, a codon for the amino acid histidine

• Coronary Artery Calcium

• Cardiff Athletic Club, a Cardiff-based multi sport organisation
• Castles and Crusades, a role-playing game
• Cauliflower Alley Club, a wrestling and boxing organization
• Commonwealth Athletic Conference, a high school athletic conference in Massachusetts, United States
• Confédération Africaine de Cyclisme (African Cycling Confederation), a confederation of governing bodies for cycling in Africa
• Capital Athletic Conference, former name of the US intercollegiate athletic conference now known as the Coast to Coast Athletic Conference
• Central American and Caribbean Games, a multi-sport regional championships event
• Command & Conquer, a series of video games
• Cricket Australia Cup, now the Futures League, an Australian cricket competition
• Club Athlétique Canadien, a Montreal-based ice hockey team
• Copa América Centenario