| Abbreviation | Definition |
|---|---|
| CSI | Computers and Structures Inc |
| CSI | Concept Systems, Inc. |
| CSI | Connectivity Services, Inc. |
| CSI | Consulting Services Inc |
| CSI | Controlled Science Incorporated |
| CSI | Controls Southeast Inc |
| CSI | Cooperative Services International |
| CSI | Creative Solutions Inc |
| CSI | Custom Staffing Inc |
| CSIC | China Shipbuilding Industry Corporation |
| CSIDC | Chhattisgarh State Industrial Development Corporation |
| CSII | Communication Services Integrated Inc |
| CSII | Control Switches International Inc |
| CSII | Credit Systems International Inc |
| CSIS | Commercial Specialists Insurance Services |
| CSL | C Summerfield Ltd |
| CSL | Canada Steamship Line |
| CSL | Cochin Shipyard Ltd |
| CSL | Commonwealth Serum Laboratories |
| CSL | Construction Specialists Ltd |