CID

CID may refer to:

Film

 * C.I.D. (1955 film), an Indian Malayalam film
 * C.I.D. (1956 film), an Indian Hindi film
 * C. I. D. (1965 film), an Indian Telugu film
 * C.I.D. (1990 film), an Indian Hindi film
 * CID 999, an Indian film series including Goa Dalli CID 999 (1968) and Operation Jackpot Nalli C.I.D 999 (1969)

Television

 * CID (Indian TV series)
 * C.I.D. (Singaporean TV series)

Police units

 * Criminal Investigation Department (disambiguation)
 * Criminal Investigation Division (disambiguation)
 * United States Army Criminal Investigation Division

Other organizations

 * Center for International Development, at Harvard University
 * Central Institute for the Deaf, in St. Louis, Missouri
 * Committee of Imperial Defence, a former part of the government of Great Britain and the British Empire
 * Conseil International de la Danse, an umbrella organization for all forms of dance in the world
 * Council of Industrial Design, a UK body renamed the Design Council
 * University of Colombo, Centre for Instrument Development, in Sri Lanka

Biology and medicine

 * Clinical Infectious Diseases, a medical journal
 * Cytomegalic inclusion disease
 * Chromosomal Interacting Domain, a self-interacting domain in bacteria

Chemistry

 * Collision-induced dissociation, a mass spectrometry mechanism
 * Compound identification number, a field in the PubChem database
 * Configuration interaction doubles, in quantum chemistry

Computing and telecommunications

 * Caller ID, a telephone service that transmits the caller's telephone number to the called party
 * Card Identification Number, a security feature on credit cards
 * Cell ID, used to identify cell phone towers
 * Centro de Investigaciones Digitales of the Universidad de La Habana
 * Certified Interconnect Designer, a certification for printed circuit-board designers
 * CID fonts, a font file format
 * Customer Induced Damage, a reason for rejection of a Return merchandise authorization

Other uses in science and technology

 * Channel-iron deposits, one of the major sources of saleable iron ore
 * Controlled Impact Demonstration, a project to improve aircraft crash survivability
 * Cubic inch displacement, a measurement in internal combustion engines

Other uses

 * Centro Insular de Deportes, an indoor sports arena in Spain
 * Chinatown–International District, Seattle
 * CID The Dummy, a video game
 * Combat Identification, the accurate characterization of detected objects for military action
 * Common-interest development, a form of housing
 * Community improvement district, an area within which businesses are required to pay an additional tax
 * The Eastern Iowa Airport (IATA code CID), serving Cedar Rapids, Iowa
 * Corpus des inscriptions de Delphes, a compendium of ancient Greek inscriptions from Delphi