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 ==Business and finance==

• 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 ==Corporate==

• Call Aircraft Company, an aircraft manufacturer in the United States • Certified Acceptance Corporation, a coin grading service • Cessna Aircraft Company, an American aircraft manufacturer • Champion Aircraft Corporation, an American aircraft manufacturer • 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, an American aircraft manufacturer • Copa Airlines Colombia • Carrington American Central • Copper Australia Courier • Cambridge Aero Corporation ==Education==

• 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 • , a middle school in Tuen Mun, Hong Kong United States • Central Arizona College, a community college in Coolidge, Arizona • Commissioner's Academic Challenge, a Florida high school academic tournament • Central Arkansas Christian Schools, a school system in North Little Rock, Arkansas • Congressional App Challenge, a science and app challenge for all congressional districts in the U.S. ==Military==

• U.S. Army Coast Artillery Corps, a U.S. Army corps • Casualty Assistance Center, assists to next-of-kin of critically injured, ill or deceased U.S. Army soldiers, retirees, and veterans • 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 Command, a component of the Transformation and Training 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 ==Politics and religion==

• 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 • 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 ==Science and technology==

• 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 • CaC, an acronym for "configuration as code" ==Medicine==

• Coronary Artery Calcium ==Sports and games==

• 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