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 Cayman Airways is the flag carrier airline of the British Overseas Territory of the Cayman Islands. With its head office in Grand Cayman, it operates mainly as an international and domestic scheduled passenger carrier, with cargo services avail ...

, a Cayman Islands airline *

Channel America Channel America (CA), officially Channel America Network, Inc., was the first United States terrestrial broadcast television network to be intentionally assembled out of LPTV, or low-power television licensees. The network was founded by David P ...

, a defunct U.S. television network *

Coal & Allied Coal & Allied is an Australia coal mining company. Operating mines in the Hunter Valley, it is a subsidiary of Yancoal. History Coal & Allied was formed in 1960 when Caledonian Collieries and J & A Brown & Abermain-Seaham Collieries merged. Ho ...

, 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 Crédit Agricole Group (), sometimes called La banque verte (, , due to its historical ties to farming), is a French international banking group and the world's largest cooperative financial institution. It is the second largest bank in France, ...

, a major French bank

Government and political

Bureau of Consular Affairs The Bureau of Consular Affairs (CA) is a bureau of the United States Department of State reporting to the under secretary of state for management. The mission of the Bureau is to administer laws, formulate regulations and implement policies rel ...

, a division of the U.S. Department of State *

Canadian Alliance The Canadian Alliance (), formally the Canadian Reform Conservative Alliance (), was a centre-right to right-wing federal political party in Canada that existed under that name from 2000 to 2003. The Canadian Alliance was the new name of the ...

, 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 Citizens' Alliances were state and local anti-trade union organizations prominent in the United States of America during the first decade of the 20th century. The Citizen's Alliances were closely related to employers' associations but allowed p ...

, 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 The Commission on Appointments (, abbreviated as CA) is a constitutional body which confirms or rejects certain political appointments made by the President of the Philippines. The current commission was created by the 1987 Constitution. Whil ...

, 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 Cary Academy is an independent, coeducational, nonsectarian, college-preparatory secondary school located in Cary, North Carolina. The school emphasizes the use of technology in the classroom, the arts, and foreign exchange. History Cary Acad ...

, a private college-preparatory school in Cary, North Carolina, United States *

Claiborne Academy Claiborne Academy is a private, non-profit, pre-kindergarten through 12th grade school located in unincorporated Claiborne Parish, Louisiana, between Haynesville and Homer. It was founded in 1969 as a segregation academy. Their nickname is ...

, a private school in Claiborne Parish, Louisiana, United States *

Clarksville Academy Clarksville Academy is a private college-preparatory school in Clarksville, Tennessee, United States, offering pre-kindergarten through grade 12. The school has several sports teams with a cougar as their mascot and school colors being royal bl ...

, a private college-preparatory school in Clarksville, Tennessee, United States *

Colorado Academy Colorado Academy (CA) is an independent nonsectarian, co-educational, college preparatory day school for students from Pre-Kindergarten through Twelfth Grade. The school's campus is located in Lakewood, Colorado, and serves approximately 1000 ...

, 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 The British Hospitality Association (BHA), incorporating The Restaurant Association (RA), was a non-government representative body for hotels, clubs, restaurants, leisure outlets and other hospitality-related organisations nationwide headquartere ...

, former UK trade association *

Cocaine Anonymous Cocaine Anonymous (CA) is a twelve-step program formed in 1982, November 18th for people who seek recovery from drug addiction. It is patterned very closely after Alcoholics Anonymous (AA), although the two groups are unaffiliated. While many C ...

, a twelve-step program * Creativity Alliance, an arm of

Creativity (religion) Creativity, historically known as the (World) Church of the Creator, is an atheistic ( nontheistic) white supremacist new religious movement espousing white separatism, antitheism, antisemitism, anti-Christianity, scientific racism, homopho ...

, 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 The Catalan Wikipedia () is the Catalan language, Catalan-language edition of the Wikipedia free online encyclopedia. It was created on 16 March 2001, just a few minutes after the first non-English Wikipedia, the German Wikipedia, German edition ...

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 In prokaryote nomenclature, ''Candidatus'' (abbreviated ''Ca.''; Latin for "candidate of Roman office") is used to name prokaryotic taxa that are well characterized but yet- uncultured. Contemporary sequencing approaches, such as 16S ribosomal R ...

'', 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 The carbonic anhydrases (or carbonate dehydratases) () form a family of enzymes that catalyst, catalyze the interconversion between carbon dioxide and water and the Dissociation (chemistry), dissociated ions of carbonic acid (i.e. bicarbonate a ...

, a family of enzymes *

Carcinoma Carcinoma is a malignancy that develops from epithelial cells. Specifically, a carcinoma is a cancer that begins in a tissue that lines the inner or outer surfaces of the body, and that arises from cells originating in the endodermal, mesoder ...

, 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 A catecholamine (; abbreviated CA), most typically a 3,4-dihydroxyphenethylamine, is a monoamine neurotransmitter, an organic compound that has a catechol (benzene with two hydroxyl side groups next to each other) and a side-chain amine. Cate ...

, 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 Cultural algorithms (CA) are a branch of evolutionary computation where there is a knowledge component that is called the belief space in addition to the population component. In this sense, cultural algorithms can be seen as an extension to a con ...

, 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 In optics, chromatic aberration (CA), also called chromatic distortion, color aberration, color fringing, or purple fringing, is a failure of a lens to focus all colors to the same point. It is caused by dispersion: the refractive index of the ...

, 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 Conservation agriculture (CA) can be defined by a statement given by the Food and Agriculture Organization of the United Nations as "Conservation Agriculture (CA) is a farming system that can prevent losses of arable land while regenerating degra ...

, 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 The City of Carlisle ( , ) was a local government district of Cumbria, England, with the status of a city. It was named after its largest settlement, Carlisle, but covered a far larger area which included the towns of Brampton and Longtown, ...

, United Kingdom, by postcode *

Catamarca Province Catamarca () is a province of Argentina, located in the northwest of the country. The province had a population of 429,556 as per the , and covers an area of 102,602 km2. Its literacy rate is 95.5%. Neighbouring provinces are (clockwise, f ...

, 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 A heavy cruiser was a type of cruiser, a naval warship designed for long range and high speed, armed generally with naval guns of roughly 203 mm (8 inches) in calibre, whose design parameters were dictated by the Washington Naval Treat ...

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 The hectare (; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), that is, square metres (), and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. A ...

= 1 square metre *

Character assassination Character assassination (CA) is a deliberate and sustained effort to damage the reputation or credibility of an individual. The term ''character assassination'' became popular around 1930. This concept, as a subject of scholarly study, was origi ...

, a deliberate and sustained effort to damage the reputation or credibility of an individual * Chartered Accountant *

Civil affairs Civil Affairs (CA) is a term used by both the United Nations and by military institutions (such as the U.S. military), but for different purposes in each case. Civil Affairs in United Nations Peace Operations Civil Affairs officers in UN Peace ...

, a term used by both the United Nations and by military institutions *

Communication arts (disambiguation) Communication is commonly defined as the transmission of information. Its precise definition is disputed and there are disagreements about whether unintentional or failed transmissions are included and whether communication not only transmit ...

Confidentiality agreement A non-disclosure agreement (NDA), also known as a confidentiality agreement (CA), confidential disclosure agreement (CDA), proprietary information agreement (PIA), or secrecy agreement (SA), is a legal contract or part of a contract between at le ...

* , 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 Tōkaidō may refer to: * Taiheiyō Belt (also Tōkaidō corridor), the megalopolis in Japan extending from Ibaraki Prefecture to Fukuoka Prefecture * Tokaido (company), a Japanese company that manufactures karate uniforms, belts, and related pro ...

from

Atami is a city located in Shizuoka Prefecture, Japan. , the city had an estimated population of 36,865 in 21,593 households

to Maibara, operated by

JR Central is the main railway company operating in the Chūbu (Nagoya) region of central Japan. It is officially abbreviated in English as JR Central and occasionally as JR Tokai (). The term ''Tōkai'' refers to the southern portion of Central Japan, ...