Cai

Cai or CAI may refer to:

Places

 * Cai (state), a state in ancient China
 * Caí River, Rio Grande do Sul, Brazil
 * Cái River, Vietnam
 * Cairo International Airport (IATA airport code)
 * Caithness, 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, a non-profit organization that promotes education in Central Asia
 * Chartered Accountants Ireland, Ireland's largest accountancy body
 * Christian Assemblies International, an Australian-based charity organisation and religious group
 * Club Alpino Italiano, 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, an influential trade association and special interest group
 * Compagnia Aerea Italiana, parent company of Alitalia
 * Corendon Airlines (ICAO airline code)
 * Corpo Aereo Italiano, 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, a measure of codon bias in protein-coding DNA sequences
 * Cold air intake, of an automobile
 * Computer-aided inspection
 * Computer assisted instruction or e-Learning
 * Computer-assisted language learning
 * Conodont Alteration Index, an estimate of the maximum temperature reached by a sedimentary rock
 * Controlled Auto-Ignition, a technology of internal combustion for reciprocating engines

Sport

 * Club Atletico Independiente de La Chorrera, a Panamanian football (soccer) team
 * Comisión de Actividades Infantiles, an Argentine football (soccer) team
 * Club Atlético Independiente, an Argentine football (soccer) team

Other uses

 * Cai (name), Welsh and alternative spelling of the name Kai.
 * Cai (surname), a common Chinese surname
 * Comprehensive Agreement on Investment, a proposed deal between China and the European Union
 * Mesoamerican languages (ISO 639-2 and ISO 639-5 codes)
 * Sir Kay, a character in Arthurian legend, spelt Cai in Welsh