CID
- C. I. D. (1965 film)
- C.I.D. (1955 film)
- C.I.D. (1956 film)
- C.I.D. (1990 film)
- C.I.D. (Singaporean TV series)
- CID (Indian TV series)
- CID The Dummy
- CID fonts
- Caller ID
- Card Identification Number
- Cell ID
- Center for International Development
- Central Institute for the Deaf
- Central Investigation Department
- Centro Insular de Deportes
- Certified Interconnect Designer
- Channel-iron deposits
- Chinatown–International District, Seattle
- Cid (Final Fantasy)
- Cid (disambiguation)
- Clinical Infectious Diseases
- Collision-induced dissociation
- Combat Identification
- Committee of Imperial Defence
- Common-interest development
- Community improvement district
- Configuration interaction
- Conseil International de la Danse
- Controlled Impact Demonstration
- Council of Industrial Design
- Criminal Investigation Department (disambiguation)
- Criminal Investigation Division (disambiguation)
- Cubic inch displacement
- Cytomegalic inclusion disease
- Goa Dalli CID 999
- Greek inscription
- List of Indian film series
- Operation Jackpot Nalli C.I.D 999
- PubChem
- Return merchandise authorization
- SID (disambiguation)
- Saints Row IV
- The Eastern Iowa Airport
- United States Army Criminal Investigation Division
- Universidad de La Habana
- University of Colombo, Centre for Instrument Development