Cai or CAI may refer to:

Places

Cai (state) Cài (; Old Chinese: *s.r̥ˤat-s) was an ancient China, Chinese State (Ancient China), state established at the beginning of the Zhou dynasty, rising to prominence during the Spring and Autumn period, and destroyed early in the Warring States ...

, a state in ancient China *

Caí River The Caí River () is a river of Rio Grande do Sul state in southern Brazil. It is a tributary of the Jacuí River, just above the junction with the Guaíba. See also *List of rivers of Rio Grande do Sul List of rivers in Rio Grande do Sul (Br ...

, Rio Grande do Sul, Brazil *

Cái River The Cái River ( vi, Sông Cái) is a river of Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, wit ...

, Vietnam *

Cairo International Airport Cairo International Airport (; ''Maṭār El Qāhira El Dawly'') is the principal international airport of Cairo and the largest and busiest airport in Egypt. It serves as the primary hub for Egyptair and Nile Air as well as several other ...

(IATA airport code) *

Caithness Caithness ( gd, Gallaibh ; sco, Caitnes; non, Katanes) is a historic county, registration county and lieutenancy area of Scotland. Caithness has a land boundary with the historic county of Sutherland to the west and is otherwise bounded by ...

, a historic county in Scotland (Chapman code)

Organisations

* Canadian Airlines International, a defunct Canadian airline * Capitol Archaeological Institute, an American archaeological research and education institute part of The George Washington University *

Central Asia Institute Central Asia Institute (CAI) is an international non-profit organization, co-founded by Greg Mortenson and Jean Hoerni in 1996. The organization is based in Bozeman, Montana and works to promote and support community-based education throughout Cen ...

, a non-profit organization that promotes education in Central Asia *

Chartered Accountants Ireland Chartered Accountants Ireland was established by Royal Charter on 14 May 1888, and is Ireland's largest accountancy body. According to its website, it represents over 30,000 members globally. Chartered Accountants Ireland is part of the Con ...

, Ireland's largest accountancy body *

Christian Assemblies International Christian Assemblies International (CAI) is an Australian-based charity organisation and religious denomination, religious group registered as Christian Assemblies Europe International. CAI was registered as a charity in Australia in 1994, and op ...

, an Australian-based charity organisation and religious group *

Club Alpino Italiano The Club Alpino Italiano is the senior Italian alpine club which stages climbing competitions, operates alpine huts, marks and maintains paths, and is active in protecting the Alpine environment. It was founded in Turin in 1863 by the then finan ...

, the Italian alpine club * Coleraine Academical Institution, a school in Northern Ireland * College of Anaesthesiologists of Ireland, a medical training body in Ireland *

Community Associations Institute The Community Associations Institute (CAI) is an international trade association and special interest group headquartered in Falls Church, Virginia, with more than 60 chapters in the United States that asserts that it provides "education and r ...

, an influential trade association and special interest group *

Compagnia Aerea Italiana Alitalia - Società Aerea Italiana S.p.A., operating as Alitalia (), was an Italian airline which was once the flag carrier and largest airline of Italy. The company had its head office in Fiumicino, Metropolitan City of Rome Capital. The ai ...

, parent company of Alitalia * Corendon Airlines (ICAO airline code) *

Corpo Aereo Italiano The ''Corpo Aereo Italiano'' (literally, "Italian Air Corps"), or CAI, was an expeditionary force from the Italian ''Regia Aeronautica'' (Italian Royal Air Force) that participated in the Battle of Britain and the Blitz during the final months o ...

, an element of the Italian ''Regia Aeronautica'' during the Battle of Britain * WCAI, a group of NPR radio stations in Massachusetts that is part of the WGBH Educational Foundation

Science and technology

* Calcium-aluminium-rich inclusion, a type of mineral * Carbonic anhydrase inhibitor, in pharmacology *

Codon Adaptation Index The Codon Adaptation Index (CAI) is the most widespread technique for analyzing Codon usage bias. As opposed to other measures of codon usage bias, such as the ' effective number of codons' (Nc), which measure deviation from a uniform bias (null hy ...

, a measure of codon bias in protein-coding DNA sequences *

Cold air intake A cold air intake (CAI) is usually an aftermarket assembly of parts used to bring relatively cool air into a car's internal-combustion engine. Most vehicles manufactured from the mid-1970s until the mid-1990s have thermostatic air intake syste ...

, of an automobile *

Computer-aided inspection Computer-aided inspection (CAI) is the use of software tools to assess manufactured objects. It is closely related to computer-aided design (CAD) and computer-aided manufacturing (CAM). Its primary purpose is to allow engineers to more quickly and ...

* Computer assisted instruction or e-Learning *

Computer-assisted language learning Computer-assisted language learning (CALL), British, or Computer-Aided Instruction (CAI)/Computer-Aided Language Instruction (CALI), American, is briefly defined in a seminal work by Levy (1997: p. 1) as "the search for and study of applicat ...

* Conodont Alteration Index, an estimate of the maximum temperature reached by a sedimentary rock *

Controlled Auto-Ignition Homogeneous Charge Compression Ignition (HCCI) is a form of internal combustion in which well-mixed fuel and oxidizer (typically air) are compressed to the point of auto-ignition. As in other forms of combustion, this exothermic reaction releases e ...

, a technology of internal combustion for reciprocating engines

Sport

Club Atletico Independiente de La Chorrera Club Atlético Independiente de La Chorrera, also known as CAI or CAI de La Chorrera, is a Panamanian football club based in La Chorrera that currently plays in the Liga Panameña de Fútbol. History CAI, as the club is often called, was founde ...

, a Panamanian football (soccer) team * Comisión de Actividades Infantiles, an Argentine football (soccer) team *

Club Atlético Independiente Club Atlético Independiente () is an Argentina, Argentine professional sports club, which has its headquarters and stadium in the city of Avellaneda in Greater Buenos Aires. The club is best known for its Association football, football team, wh ...

, an Argentine football (soccer) team

Other uses

Cai (name) The name Kai or Cai has various origins and meanings in different cultures: * In Estonian, Kai is a female (and very rarely male) name meaning "pier" or "quay". * In Japanese, ''kai'' has a number of meanings, including "ocean" (海), "shell" (� ...

, Welsh and alternative spelling of the name Kai. *

Cai (surname) Cài () is a Chinese-language surname that derives from the name of the ancient Cai state. In 2019 it was the 38th most common surname in China, but the 9th most common in Taiwan (as of 2018), where it is usually romanized as "Tsai" (based on ...

, a common Chinese surname *

Comprehensive Agreement on Investment Comprehensive may refer to: *Comprehensive layout, the page layout of a proposed design as initially presented by the designer to a client. * Comprehensive school, a state school that does not select its intake on the basis of academic achievement ...

, a proposed deal between China and the European Union *

Mesoamerican languages Mesoamerican languages are the languages indigenous to the Mesoamerican cultural area, which covers southern Mexico, all of Guatemala and Belize and parts of Honduras and El Salvador and Nicaragua. The area is characterized by extensive linguistic ...

(

ISO 639-2 ISO 639- 2:1998, ''Codes for the representation of names of languages — Part 2: Alpha-3 code'', is the second part of the ISO 639 standard, which lists codes for the representation of the names of languages. The three-letter codes given for eac ...

and ISO 639-5 codes) * Sir Kay, a character in Arthurian legend, spelt ''Cai'' in Welsh