| Abbreviation | Definition |
|---|---|
| ECMV | E Com Ventures, Inc. |
| ECNC | EConnect |
| ECOI | Eco 2, Inc. |
| ECOL | American Ecology Corporation |
| ECOM | Princeton Economic Corporation |
| ECOS | E C O S Group, Inc. |
| ECOS | ECOS Group, Incorporated (de-listed) |
| ECPL | U S Plastic Lumber Company |
| ECRL | ECommercial.Com, Inc. |
| ECRU | E-Cruiter.Com |
| ECSC | Ecoscience Corporation |
| ECSG | Ecsoft Group, P. L. C. |
| ECSI | Endocardial Solutions, Inc. |
| ECSX | E C S Industries, Inc. |
| ECTL | Elcotel, Inc. |
| ECTS | Electronic Transfer Association |
| ECTX | Ectel, LTD. |
| EDAC | Edac Technologies Corporation |
| EDAYE | Edap TMS S. A. |
| EDCI | Educor International, Inc. |