CID may refer to:
Film
Several Indian films have the mention of Criminal Investigation Department (as C.I.D.) in their title:
- 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
Organizations
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
Science and technology
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