CA most often refers to: *

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

, a country by ISO 3166-1 alpha-2 code *

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

, U.S. state by postal abbreviation CA or ca may also refer to:

Businesses and organizations

Companies

* Air China (IATA airline code CA) * CA Technologies, a U.S. software company * Cayman Airways, a Cayman Islands airline * Channel America, a defunct U.S. television network * Coal & Allied, Australian mining company * Continental Airlines, a U.S. airline * Creative Assembly, a PC game developer * Crédit Agricole, a major French bank

Government and political

* Bureau of Consular Affairs, a division of the U.S. Department of State * 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 * Combined authority, a local government entity in the United Kingdom * Commission on Appointments, a body of the Congress of the Philippines * Conservatives Abroad, overseas wing of the British Conservative Party * Countryside Alliance, a British political organization * Court of Appeals * Customs Administration, an agency of Taiwan

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

Other organizations

* Caterers' Association, former UK trade association * Cocaine Anonymous, a twelve-step program * Creativity Alliance, an arm of Creativity (religion), a white supremacist organization

In 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 Catalan () is a Western Romance languages, Western Romance language and is the official language of Andorra, and the official language of three autonomous communities of Spain, autonomous communities in eastern Spain: Catalonia, the Balearic I ...

(ISO 639 alpha-2 language code) * ca, the subdomain for Catalan Wikipedia * Contrastive analysis, the systematic study of a pair of languages

Mathematics, science, and technology

Biology and medicine

* ''CA'' (journal), a medical journal * ''Ca'' (moth), a moth genus * ''Ca.'', abbreviation for '' Candidatus'', for taxonomical names that have not been completely described * Cancer * Carbonic anhydrase, a family of enzymes * Carcinoma, a type of cancer *

Cardiac arrest Cardiac arrest (also known as sudden cardiac arrest CA is when the heart suddenly and unexpectedly stops beating. When the heart stops beating, blood cannot properly Circulatory system, circulate around the body and the blood flow to the ...

Chemistry

* Calcium, symbol Ca, a chemical element * Catecholamine, an organic compound * Cellulose acetate, a type of plastic * ''Chemical Abstracts'', a publication of

Chemical Abstracts Service Chemical Abstracts Service (CAS) is a division of the American Chemical Society. It is a source of chemical information and is located in Columbus, Ohio, United States. Print periodicals ''Chemical Abstracts'' is a periodical index that provid ...

* Cyanoacrylate, a chemical compound

Mathematics and computing

* Cellular automaton, a discrete mathematical model * Certificate authority, an entity issuing digital certificates for secure communications * Correspondence analysis, a multivariate statistical technique * Cultural algorithm, a type of evolutionary computation in computer science

Other uses in science and technology

* Centiampere (cA), an SI unit of electric current * Certificate Authority (CA), an entity that issues digital certificates * ''CA''-class submarine, a World War II Italian midget submarine * Nissan CA engine, used in smaller Nissan vehicles * Chromatic aberration, a distortion in optical lenses * Conditional access, in broadcast engineering * Conservation agriculture, a food system * Conversation Analysis, the study of talk in interaction

Places

* Cả River, in Laos and Vietnam * Province of Cádiz, Spain * City of Carlisle, United Kingdom, by postcode * Catamarca Province, Argentina *

Central America Central America is a subregion of North America. Its political boundaries are defined as bordering Mexico to the north, Colombia to the southeast, the Caribbean to the east, and the Pacific Ocean to the southwest. Central America is usually ...

* Tokyo Bay Aqua-Line, a bridge-tunnel across Tokyo Bay area in Japan, numbered as CA

Other uses

* .ca, Internet country code for Canada * CA-, a road designation for highways part of the Central American highway network * CA, the official designation for heavy cruiser in the U.S. Navy from 1920–1945 * 'CA': Tactical Naval Warfare in the Pacific 1941-43, a 1973 board wargame that simulates World War II naval combat * Ca Mè Mallorquí, a dog breed native to Spain * centiare = 1 square metre * Character assassination, a deliberate and sustained effort to damage the reputation or credibility of an individual * Chartered Accountant * Civil affairs, a term used by both the United Nations and by military institutions * Communication arts (disambiguation) * Confidentiality agreement * , a type of corporate organization in Venezuela * Current account (disambiguation), in economics * A US Navy hull classification symbol: Heavy cruiser (CA) * CA, symbol for JR Tōkaidō Line from Atami to Maibara, operated by JR Central