| Acronym | Definition |
|---|
| CCIU➣Chester County Intermediate Unit (Pennsylvania) |
| CCIU➣Comité Central Israelita del Uruguay (Spanish: Jewish Central Committee of Uruguay) |
| CCIU➣CEF (Contigency Expeditionary Force) Control Interface Unit (US DoD) |
| CCIU➣Computer Crimes Investigation Unit |
| CCIU➣Central Criminal Investigation Unit (Kosovo) |
| CCIU➣Commercial Central Interface Unit. |