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 Air China, officially Air China Limited, ( zh, s=中国国际航空公司, labels=no, ''Zhōngguó guójì hángkōng gōngsī'') is a major Chinese airline and the flag carrier of the People's Republic of China. It is headquartered in Shunyi ...

(IATA airline code CA) *

CA Technologies CA Technologies, Inc., formerly Computer Associates International, Inc., and CA, Inc., was an American multinational corporation, multinational enterprise software developer and publisher that existed from 1976 to 2018. CA grew to rank as one o ...

, 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 Continental Airlines (simply known as Continental) was a major airline in the United States that operated from 1934 until it merged with United Airlines in 2012. It had ownership interests and brand partnerships with several carriers. Continen ...

, 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 Centre Alliance (CA), formerly known as the Nick Xenophon Team (NXT), is a centrist List of political parties in Australia, Australian political party based in the state of South Australia. It currently has one elected representative, Rebekha ...

, Australian political party formerly known as Nick Xenophon Team * Citizens' Alliance, a political party in Trinidad and Tobago *

Combined authority A combined authority (CA) is a type of local government institution introduced in England outside Greater London by the Local Democracy, Economic Development and Construction Act 2009. CAs are created voluntarily and allow a group of local au ...

, 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 The Countryside Alliance (CA) is a British organisation promoting issues relating to the countryside such as farming, rural services, small businesses and field sports, aiming to "Give Rural Britain a voice". History The Countryside Allian ...

, a British political organization *

Court of Appeals An appellate court, commonly called a court of appeal(s), appeal court, court of second instance or second instance court, is any court of law that is empowered to hear a case upon appeal from a trial court or other lower tribunal. Appellat ...

* 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 Concord Academy (also known as CA) is a coeducational, Independent school, independent University-preparatory school, college-preparatory school for boarding and day students in Concord, Massachusetts. CA educates approximately 400 students in ...

, a private college-preparatory school in Concord, Massachusetts, United States *

Connections Academy Connections Academy is a for-profit corporate provider of online school products and services to virtual schools for grades K-12, including full-time online school. In the United States the company is noted as Connections Academy, and for studen ...

, an online school based in Baltimore, Maryland, United States *

Culver Academies Culver Academies is a college preparatory boarding school in Culver, Indiana, which is composed of three entities: Culver Military Academy (CMA) for boys, Culver Girls Academy (CGA), and the Culver Summer Schools and Camps (CSSC). Culver Militar ...

, a boarding school and summer camp program in Culver, Indiana, United States

In sport

California Angels The Los Angeles Angels are an American professional baseball team based in the Greater Los Angeles area. The Angels compete in Major League Baseball (MLB) as a member club of the American League (AL) West Division. Since 1966, the team has pl ...

, former name of a professional baseball team currently known as Los Angeles Angels *

Club Africain Club Africain (), known as CA for short, is a Tunisian professional football club based in Tunis. The club was founded in 1920 and its colours are red and white. Their home stadium, Hammadi Agrebi Stadium, has a capacity of 60,000 spectators. ...

, a multi-sport club from Tunis, Tunisia *

Cricket Australia Cricket Australia (CA) is the governing body for professional and amateur cricket in Australia. It was originally formed in 1905 as the 'Australian Board of Control for International Cricket'. It is incorporated as an Australian Public Company ...

, 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 Circa is a Latin word meaning "around, approximately". Circa or CIRCA may also refer to: * CIRCA (art platform), in London * Circa (band), a progressive rock supergroup * Circa (company), an American skateboard footwear company * Circa (contempora ...

'', 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 Contrastive analysis is the systematic study of a couple of languages with a view to identifying their structural differences and similarities. Historically it has been used to establish language genealogies. Second language acquisition Contras ...

, 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 Cancer is a group of diseases involving Cell growth#Disorders, abnormal cell growth with the potential to Invasion (cancer), invade or Metastasis, spread to other parts of the body. These contrast with benign tumors, which do not spread. Po ...

* 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 Calcium is a chemical element; it has symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to it ...

, symbol Ca, a chemical element * Catecholamine, an organic compound *

Cellulose acetate In biochemistry, cellulose acetate refers to any acetate ester of cellulose, usually cellulose diacetate. It was first prepared in 1865. A bioplastic, cellulose acetate is used as a film base in photography, as a component in some coatings, and ...

, 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 Cyanoacrylates are a family of strong fast-acting adhesives with industrial, medical, and household uses. They are derived from ethyl cyanoacrylate and related esters. The cyanoacrylate group in the monomer rapidly polymerizes in the presence ...

, a chemical compound

Mathematics and computing

Cellular automaton A cellular automaton (pl. cellular automata, abbrev. CA) is a discrete model of computation studied in automata theory. Cellular automata are also called cellular spaces, tessellation automata, homogeneous structures, cellular structures, tessel ...

, a discrete mathematical model *

Certificate authority In cryptography, a certificate authority or certification authority (CA) is an entity that stores, signs, and issues digital certificates. A digital certificate certifies the ownership of a public key by the named subject of the certificate. Thi ...

, an entity issuing digital certificates for secure communications *

Correspondence analysis Correspondence analysis (CA) is a multivariate statistical technique proposed by Herman Otto Hartley (Hirschfeld) and later developed by Jean-Paul Benzécri. It is conceptually similar to principal component analysis, but applies to categorical ...

, 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 In cryptography, a certificate authority or certification authority (CA) is an entity that stores, signs, and issues digital certificates. A digital certificate certifies the ownership of a public key by the named subject of the certificate. Thi ...

(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 Conditional access (CA) is a term commonly used in relation to software and to digital television systems. Conditional access is an evaluation to ensure the person who is seeking access to content is authorized to access the content. Access is man ...

, 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 Cádiz is a Provinces of Spain, province of southern Spain, in the southwestern part of the Autonomous communities of Spain, autonomous community of Andalusia. It is the southernmost part of mainland Spain, as well as the southernmost part of ...

, 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 A route (or road) number, designation or abbreviation is an identifying numeric (or alphanumeric) designation assigned by a highway authority to a particular stretch of roadway to distinguish it from other routes and, in many cases, also to indica ...

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