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 „”, the lift-induced drag coefficient Other uses Cote 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