| Abbreviation | Definition |
|---|---|
| CI | Certified Instructor |
| CI | Chief Inspector |
| CI | Claims Inspector |
| CI | Claims Investigator |
| CI | Co Investigator |
| CI | Component Inspector |
| CI | Computer Instructor |
| CI | Criminal Investigator |
| CIA | Chief Information Advisor |
| CIA | Christian Indie Artist |
| CIA | Counter Intelligence Associates |
| CIA | Course Instruction Assistant |
| CIA | Crime Implementation Analyst |
| CIAQM | Council-certified Indoor Air Quality Manager |
| CIC | Certified Insurance Counselor |
| CID | Certified Interconnect Designer |
| CID | Chemistry Instructor Director |
| CIE | Council-certified Indoor Environmentalist |
| CIEC | Council-certified Indoor Environmental Consultant |
| CIER | Council-certified Indoor Environmental Remediator |