| Abbreviation | Definition |
|---|---|
| COGI | Cognicase, Inc. |
| COGN | Cognos, Inc. |
| COGX | Corgenix Medical Corporation |
| COHB | Cohoes Bancorp, Inc. |
| COHO | Coho Energy, Inc. |
| COHR | Coherent, Inc. |
| COHT | Cohesant Technology, Inc. |
| COHU | Cohu, Inc. |
| COII | Computerized Thermal Imaging |
| COKE | Coca Cola Bottling Company Consolidated |
| COLB | Columbia Banking System, Inc. |
| COLL | Collins Industries, Inc. |
| COLM | Columbia Sportswear Company |
| COLO | Colonels International, Inc. |
| COLT | C O L T Telecom Group, PLC. |
| COLV | Cole Computer Corporation |
| COMM | CoreComm, Limited |
| COMS | 3Com Corporation |
| COMT | Coda Music Technology, Inc. |
| COMX | Comtrex Systems Corporation |