| Abbreviation | Definition |
|---|---|
| CLSC | Classic Communications, Inc. |
| CLSI | Clancy Systems International, Inc. |
| CLSP | Callisto Pharmaceuticals, Inc. |
| CLSR | Closure Medical Corporation |
| CLST | CellStar Corporation |
| CLSY | Coinless Systems, Inc. |
| CLTC | Clarion Technologies |
| CLTK | Celeritek, Inc. |
| CLTR | Coulter Pharmaceuticals, Inc. |
| CLTX | Collateral Therapeutics, Inc. |
| CLUB | Golf Communities of America |
| CLUCE | ClubCharlie.Com, Inc. |
| CLUO | Calcasieu Restaurant & Oil Company |
| CLWK | Clearworks.Net, Inc. |
| CLWR | Clearwire Corporation |
| CLWT | Euro Technology Holdings Company, LTD. |
| CLWTW | Euro Technology Holdings Company, Ltd. Warrants |
| CLWY | Calloways Nursery, Inc. |
| CLXX | Celexx Corporation |
| CLXXE | Celexx Corporation |