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 demolition firm

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 method of fuel injection in diesel engines
  • Course deviation indicator, an aircraft navigation instrument

Other uses in science and technology

  • Capacitive deionization, a water desalination technology based on the use of electrical field effects
  • Common direct injection, a synonym of common rail; a type of fuel injection
  • Customer data integration, a discipline concerned with representation of data in enterprise systems
  • Cyrel Digital Imager, a direct laser-engraving flexography plate printing device
  • .cdi filename extension, for DiscJuggler disk images, developed by Padus
  • „<math display="inline">C_{D,i}</math>”, the lift-induced drag coefficient

Other uses

  • Côte d'Ivoire, a country in West Africa once known as Ivory Coast
  • Chief of Defence Intelligence, head of the UK Defence Intelligence Staff
  • Ciudad de las Ideas (conference), a conference at Puebla, Mexico
  • Custodial Detention Index, a list of U.S. residents compiled by FBI during 1939–1941, later used for Japanese-American internment
  • Chak De! India, a 2007 Bollywood sports film about field hockey in India
  • 401 in Roman numerals
  • Certified Deaf Interpreter, a certificate offered by the Registry of Interpreters for the Deaf