(a) Corporate Average Fuel Economy standard CAI – (i) Computer Assisted Instruction CAIR – (i) Council on American-Islamic Relations Calabarzon – (p) A region in the Philippines: CAvite, LAguna, BAtangas, Rizal, queZON CALL – (a) (U.S.) Center for Army Lessons Learned CALM – (p) Communications, Air-interface, Long and Medium range CalPERS – (p) California Public Employees' Retirement System CalSTRS – (p) California State Teachers' Retirement System Caltrans – (p) California Department of Transportation CAM (a) Chemical Agent Monitor Complementary and alternative medicine Computer-Aided Manufacturing Crassulacean acid metabolism (type of photosynthesis) CAMRA – (p) CAMpaign for Real Ale CAN – (s) Canada (ISO 3166 trigram) CANA – (a) Convulsive Antidote, Nerve Agent CANDU – (p) CANada Deuterium Uranium (nuclear reactor design) Canola – (p) Canadian oil, low acid (referring to a specific cultivar of rapeseed bred to have a low erucic acid content) CAP (i) Combat Air Patrol Civil Air Patrol Common [Operating/Operational] Air Picture Crisis Action Procedures Common Agricultural Policy (European Union) CAPES (p) CAPability Evaluation System (a) Combined Arms Planning and Execution System CAQ – (i) Coalition Avenir Québec (French, "Coalition for Québec's Future"; political party in that Canadian province) CARB (i) – California Air Resources Board CARE (a) Citizens Association for Racial Equality (former New Zealand organisation) (p) Community database on Accidents on the Roads in Europe (a) Cooperative for Aid and Relief Everywhere (originally Cooperative for American Remittances to Europe) CARMONETTE – (p) Computerized Monte Carlo Simulation CARP – (a) Computed Air Release Point CART – (a) Championship Auto Racing Teams (now defunct) CAS (i) Chemical Abstracts Service Chief of the Air Staff Close Air Support CASA –(a) Civil Aviation Safety Authority CASE (a) Cellular ammunition storage equipment Computer-Aided Software Engineering CASS – (a) Command Activated Sonobuoy System CASTFOREM – (p) Combined Arms and Support Task FORce Evaluation Model CASTOR – (a) Canadian Automatic Small Telescopes for Orbital Research cat – (s) Catalan language (ISO 639-2 code) CAT (a) Community Acceptance Testing Computer-Assisted (or Axial) Tomography CATK – (p) Counterattack CATS – (a) Computer Active Technology Suspension CATT – (a/i) Combined Arms Tactical Trainer CAV – (p) Cavalry CAVOK – (p) Ceiling And Visibility OK ("Kav-okay") CAW – (i) Canadian Auto Workers (trade union) CB CB (i) Citizens' Band radio (s) Cambodia (FIPS 10-4 country code) CBASSE – (a) Commission on Behavioral And Social Sciences and Education ("sea bass") CBC (i) Canadian Broadcasting Corporation Christmas Bird Count