| Abbreviation | Definition |
|---|---|
| CI | Corrosion Inhibitor |
| CI | Custom Indicator |
| CIC | Completely In the Canal |
| CID | Central Investigation Department |
| CID | Critical Incident Debriefing |
| CIDLI | Cantilevered Independent Dynamic Linkless Indespension |
| CIDRIVING | In Missouri c&I driving ticket is usually given when vehicle accident is involved. However it also |
| CIE | Coming In Empty |
| CIF | Cost Insuance Freight |
| CIF | Cost, Insurance, and Freight |
| CIFC | Cost Insurance Freight and Commission |
| CIFC | Cost Insurance Freight Commission |
| CIFFA | Canadian International Freight Forwarders Association |
| CIN | Cincinnati Amtrak Station |
| CIP | Canal Improvement Project |
| CIP | Capital Investment Plan |
| CIP | Carriage and Insurance Paid |
| CIRO | Content In Result Out |
| CIRTA | Central Indiana Regional Transportation Authority |
| CIS | Cargo Information Service |