CA

The term CA commonly means:

• California, a U.S. state
• Canada, a nation on the North American continent
• Chartered Accountant
• Compressed Air, such as "CA Piping"
• Certificate Authority
• Cyanoacrylate, a chemical compound

See numerous other uses below, by category.

The term ca commonly means (more below):

• circa, as meaning approximately (ca.)
• .ca, Internet country code for Canada

The term Ca commonly means:

• Calcium, as a symbol for the chemical element (Ca)

The term cA commonly means:

• Centiampere, an SI unit of electric current (cA)

People

• Caesar Augustus, first Roman Emperor
• Carmelo Anthony, National Basketball Association player
• Christina Aguilera, singer and songwriter
• Clay Aiken, singer from American Idol

Organizations

Companies

• Air China, IATA airline designator (CA)
• CA Technologies, formerly known as Computer Associates
• C&A stores
• Cayman Airways, airline
• Channel America, a defunct US television network
• Classic Army, a Hong Kong based manufacturer of airsoft replicas
• Continental Airlines, airline
• Creative Assembly, PC Game Developer
• Crédit Agricole, major French bank
• Cyber Acoustics, audio equipment

Other

• Cricket Australia
• Bureau of Consular Affairs, a division of the US Department of State
• California Angels, former name of a professional baseball team currently known as Los Angeles Angels of Anaheim
• Canadian Alliance, a former Canadian political party
• Citizens' Alliance, a political party in Trinidad and Tobago
• Cocaine Anonymous
• Conscientious Arsonists, Greek terrorist organization
• Countryside Alliance, UK
• Crédit Agricole
• Cruising Association
• Cycling Australia

Education

• Canadian Academy, an international school in Kobe, Japan
• Cary Academy, a North Carolina school
• Claiborne Academy
• Clarksville Academy, a private college-preparatory school
• Colorado Academy, a private college-preparatory school with k-12 education
• Connections Academy
• The Culver Academies (Culver Military Academy / Culver Girls Academy), a boarding school and summer camp program

Places

• Cả River, a river in Laos and Vietnam
• Cagliari, capital of the island of Sardinia, Italy (CA)
• California (United States postal abbreviations)
• Canada
  • ISO 3166-1 alpha-2, FIPS Pub 10-4 and obsolete NATO digram (CA)
  • .ca is the country code top level domain for Canada
• Carlisle, the United Kingdom postcode for the region in north-western England served by the Carlisle postal sorting office
• Catamarca Province, in Argentina
• Central America
• Province of Cádiz in Spain.

Science and medicine

• Calcium, symbol for the chemical element (Ca)
• Lift coefficient ($c_\mathrm a\, ,$ $c_\mathrm l\,$ or $\!\ c_\mathrm z$)
• Cancer
  • Carcinoma
• Carbonic anhydrase
• Cardiac arrest
• Cellular automaton
• Chemical Abstracts, an index of the scientific literature in chemistry and related fields, supplemented by abstracts
• Chromatic aberration, observed in photographic images when a lens fails to focus all colours to the same convergence point
• Conversation Analysis, the study of talk in interaction
• Cornu ammonis, names of hippocampal subregions
• Cyclophosphamide and Adriamycin, a chemotherapy regimen used to treat breast cancer
• Coronary Artery

Technology

• CA (submarine) A World war two Italian midget submarine design
• Armored cruiser, U.S. Navy hull classification symbol, pre 1930 (CA)
• Cellulose acetate, a type of plastic.
• Centiampere, an SI unit of electric current (cA)
• Certificate authority (or Certification Authority) (CA)
• Chromatic aberration, a distortion in optical lenses
• Compressed Air, such as "CA Piping" or "CA System" etc.
• Computer Animation (CA)
• Conditional access, Conditional Access (Broadcast)
• Conservation Agriculture
• Controlled atmosphere
• Cranking amperes, a measurement on an automotive battery
• Cultural algorithm (CA)
• Cyanoacrylate, superglue
• Heavy cruiser, U.S. Navy hull classification symbol (CA)

Other

• The law of Comparative Advantage
• Catalan language, ISO 639 alpha-2 language code (ca)
• Central Administration
• Certified archivist, a type of archivist in the United States
• Chartered accountant (CA)
• Chief of Army (Australia)
• Christian anarchism, or an adherent of Christian anarchism
• Civil Affairs, the official name for military units that conduct civil-military operations
• Class A (disambiguation)
• Combat Arms, a popular first-person shooter
• Confidentiality Agreement
• Copa América‚ an association football tournament
• CA are the first two letters on the license plates of vehicles registered in the City of Cape Town
• CA, Casio's mobile phones in Japan
• CA, abbreviation for Chief Adjudicator in debating.