| Abbreviation | Definition |
|---|---|
| CHSI | Community Health Systems Inc |
| CHSI | Comprehensive Health Services Inc |
| CHWI | Cedar Homes of Washington Inc |
| CI | Check in (IBM) |
| CI | Children, Inc. |
| CI | Creative Innovations |
| CIA | Creative Intelligence Associates |
| CIAA | Chiysonovelty Intellectuals Advancement Alliance |
| CIAI | Consumer Interest Alliance Inc |
| CIAL | Christchurch International Airport Ltd |
| CIAL | Coal India America Ltd |
| CIAL | Cochin International Airport Ltd |
| CIAL | Cochin International Airport, Limited |
| CIBC | Completely Inept Banking Company |
| CIBICI | Choose It, Buy It, Cook It |
| CIBIL | Credit Information Bureau (India), Limited |
| CIBIL | Credit Information Bureau India Ltd |
| CIBIL | Credit Information Bureau of India ltd |
| CIC | Central Intelligence Corporation |
| CIC | Community Improvement Corporation |