CDI, CDi, CD-i, or .cdi may refer to: Businesses and organizations Government and political organizations Center for Defense Information, a Washington, D.C. think tank founded in 1972 Center for Digital Inclusion, originally "Comitê para Democratização da Informática", a non-governmental organization in Brazil Centrist Democrat International, formerly the Christian Democrat International, a political international formed in 1961 China Development Institute, a Shenzhen, China think tank founded in 1989 Comisión Nacional para el Desarrollo de los Pueblos Indígenas, Mexico's National Commission for the Development of Indigenous Peoples California Department of Insurance, The State of California insurance regulation department Schools and colleges CDI College, a for-profit college in Canada Collège des Ingénieurs, educational institution in France, Germany and Italy Control Data Institute, an international technical vocational school created by the American Control Data Corporation Other businesses Camperdown Dairy International, an Australian infant formula company CDI Corporation, an engineering services and employment agency in Philadelphia, PA Cellular Dynamics International, an American research support company Churchill Downs Incorporated, parent company of Churchill Downs Controlled Demolition, Inc., a Phoenix, Maryland firm that specializes in controlled demolition Chungdahm Institute, a company in Korea that specializes in teaching English Economics Category Development Index, measures the sales strength of a particular category of product, within a specific market Contrat à durée indéterminée, French for open-ended contract, the usual form of employment contract in France Child Development Index, a measure of global child poverty CREST Depositary Interest, in investing, a form of depositary receipt in the UK Science and technology In chemistry, biology and medicine Carbonyldiimidazole, an activating agent used for example for peptide coupling Central diabetes insipidus, an endocrine disorder Clinical documentation improvement, a process of improving healthcare records Clostridioides difficile infection, an intestinal disease also known as Clostridium difficile infection Combined drug intoxication, also known as Multiple Drug Intake (MDI) Contact-dependent growth inhibition, a type of toxin delivery between bacteria which requires direct contact Cyclin-dependent kinase inhibitor protein, a protein which inhibits cyclin-dependent kinase Computing Contexts and Dependency Injection, a Java standard for the inversion of control design pattern CD-i, a CD-derived multimedia format, including its players made by Philips Imaging techniques Coherent diffraction imaging, a lensless nanoscale imaging technique Current density imaging, an extension of magnetic resonance imaging (MRI) Color doppler imaging, a type of Doppler ultrasonography In transportation Capacitor discharge ignition or thyristor ignition, a type of electronic ignition system Common rail diesel injection, a modern