English abbreviations from cyblk to cz
- CYBLK (cyberlook log)
- CYC (Caye Chapel Airport)
- CYCI (California Youth Council Institute)
- CYD (Community Youth Development)
- CYDIP (cyberdip log)
- CYDN (cyberdon log)
- CYDS (Comprehensive Youth Development System)
- CYF (Chefornak Airport (FAA: CFK))
- CYFUSA (Catholic Youth Foundation, United States of America)
- CYG (Corryong Airport)
- CYI (Chiayi Airport)
- CYIA (Christian Youth In Action)
- CYL (Coyoles Airport)
- CYLA (California Youth Leaders Association)
- cym (Welsh language (ISO 639-2 code))
- CYO (Catholic Youth Organization)
- CYP (Calbayog Airport)
- CYPRO (cyberproducts log)
- CYR (Laguna de los Patos International Airport)
- CYS (Cheyenne Regional Airport (Jerry Olson Field))
- CYSC (Catholic Youth Summer Camp)
- CYT (Yakataga Airport)
- CYU (Cuyo Airport)
- CYW (Captain Rogelio Castillo National Airport)
- CYX (Chersky Airport)
- CYZ (Cauayan Airport)
- CZ (Czochralski Process)