CA or ca may refer to:
Places
Americas
Canada, a country, by ISO 3166-1 alpha-2 code California, a U.S. state, by postal abbreviation Central America Catamarca Province, Argentina
Europe
Province of Cádiz, Spain CA postcode area, United Kingdom Čadca District, Slovakia, former vehicle registration plate code
Asia
Cả River, in Laos and Vietnam
Transportation
Airlines
Air China (IATA airline code CA) Cayman Airways, a Cayman Islands airline Continental Airlines, a U.S. airline
Driving
Tokyo Bay Aqua-Line, a bridge-tunnel across Tokyo Bay area in Japan, numbered as CA CA-, the Central American highway network's route number prefix Nissan CA engine (Clean Air)
Maritime CA, a US Navy hull classification symbol: Heavy cruiser (CA) CA-class submarine, a group of midget submarines built for the Italian Navy during World War II
Train
, the route code for Tōkaidō Line (Shizuoka area), operated by Central Japan Railway Company (JR Central)
Mathematics, science, and technology Life sciences Conservation agriculture, a food system Ca Mè Mallorquí, a dog breed native to Spain Ca (moth), a genus in the family Dalceridae Ca., abbreviation for Candidatus, for taxonomical names of prokaryotes (such as bacteria) that have not been completely described CA (journal), subtitled A Cancer Journal for Clinicians Cancer Carcinoma, a type of cancer Cardiac arrest Carbonic anhydrase, a family of enzymes
Chemistry Catecholamine, an organic compound Calcium, symbol Ca, a chemical element Cellulose acetate, a type of plastic Chemical Abstracts, a publication of Chemical Abstracts Service Cyanoacrylate, a family of adhesives
Mathematics, computing, and telecommunications Correspondence analysis, a multivariate statistical technique Cellular automaton, a discrete mathematical model Cultural algorithm, a type of evolutionary computation in computer science Certificate authority, an entity issuing digital certificates for secure communications Creative Assembly, a PC game developer Computer Associates International, Inc., later known as CA Technologies, Inc., a U.S. software company .ca, Internet country code for Canada ca.wikipedia.org, Catalan Wikipedia () Channel America, a defunct U.S. television network Conditional access, in broadcast engineering
Other uses in science and technology Centiampere (cA), an SI unit of electric current Chromatic aberration, a distortion in optical lenses
Language and linguistics
Ca., an abbreviation for circa, meaning "approximately" in Latin Ça, French demonstrative pronoun Ca (Indic), a glyph in the Brahmic family of scripts Ca (Javanese), a letter in the Javanese script Catalan language (ISO 639 alpha-2 language code) Contrastive analysis, the systematic study of a pair of languages Conversation analysis, the study of talk in interaction
Schools
Canadian Academy, an international school in Kobe, Japan Cary Academy, a private college-preparatory school in Cary, North Carolina, United States Claiborne Academy, a private school in Claiborne Parish, Louisiana, United States Clarksville Academy, a private college-preparatory school in Clarksville, Tennessee, United States Colorado Academy, a private college-preparatory school in Lakewood, Colorado, United States Concord Academy, a private college-preparatory school in Concord, Massachusetts, United States Connections Academy, an online school based in Baltimore, Maryland, United States Culver Academies, a boarding school and summer camp program in Culver, Indiana, United States
In sport California Angels, former name of a professional baseball team currently known as Los Angeles Angels Club Africain, a multi-sport club from Tunis, Tunisia Cricket Australia, the governing body for professional and amateur cricket in Australia Cruising Association, a UK membership organization for sailors Cycling Australia, the national governing body for bicycle racing in Australia
Government entities
Bureau of Consular Affairs, a division of the U.S. Department of State Combined authority, a local government entity in the United Kingdom Commission on Appointments, a body of the Congress of the Philippines Court of Appeals Customs Administration, an agency of Taiwan
Political parties and interest groups
Canadian Alliance, a former Canadian political party Centre Alliance, Australian political party formerly known as Nick Xenophon Team Citizens' Alliance, a political party in Trinidad and Tobago Conservatives Abroad, overseas wing of the British Conservative Party Countryside Alliance, a British political organization Caterers' Association, former UK trade association
Business
Crédit Agricole, a major French bank Chartered accountant Confidentiality agreement or non-disclosure agreement, a contractual promise to restrict access to shared information , in Venezuela and Andorra, the equivalent of S.A. (corporation) Current account (disambiguation), a term with multiple meanings in macroeconomics and microeconomics / finance When appended to a stock-market ticker symbol (e.g. AAPL:CA): traded on Toronto Stock Exchange
Other uses 'CA': Tactical Naval Warfare in the Pacific 1941-43, a 1973 board wargame that simulates World War II naval combat centiare = 1 square metre Character assassination, a deliberate and sustained effort to damage the reputation or credibility of an individual Civil affairs, a term used by both the United Nations and by military institutions Coal & Allied, Australian mining company Cocaine Anonymous, a twelve-step program Creativity Alliance, an arm of Creativity (religion), a white supremacist organization
See also Communication arts (disambiguation) Circa (disambiguation) Class A (disambiguation) Ka (disambiguation) SA (disambiguation) Caca (disambiguation) :ru:СА :chr:ᏣᏱ :ko:ꥢ