| Abbreviation | Definition |
|---|---|
| CIN | Competition Is Nada |
| CIO | Centre of Internal Operations |
| CIP | Capital Improvement Plan |
| CIP | Capital Improvements Program |
| CIP | Common Industrial Protocol |
| CIP | Computer Incorporated People |
| CIP | Computer Investment Program |
| CIP | Continuous Improvement Plan |
| CIP | Continuous Improvement Process |
| CIP | Customer Information Program |
| CIPDC | Combined Import Processing and Distribution Centres |
| CIQ | Car Insurance Quote |
| CIR | Computer Investment Research |
| CIR | Consolidation Integration Redistribution |
| CIRIA | Construction Industry Research and Information Association |
| CIS | Client Information System |
| CIS | Common Information System |
| CIS | Computer Information System |
| CIS | Computer Integrated Services |
| CIS | Construction Industry Scheme |