| Abbreviation | Definition |
|---|---|
| ACVC | Active Voice Corporation |
| ACXM | Acxiom Corporation |
| ADAC | A D A C Laboratories |
| ADAM | Adam.Com |
| ADAP | Adaptive Broadband Corporation |
| ADBE | Adobe Systems, Inc. |
| ADBK | Advantage Bank of Branchburg |
| ADBL | Audible, Inc. |
| ADCC | Andean Development Corporation |
| ADCCW | Andean Development Corporation Warrants |
| ADCO | American Resources & Development Company |
| ADCT | A D C Telecom, Inc. |
| ADDB | AddBack Corporation |
| ADDB | AddBlack Corporation |
| ADDDF | Adidas Solomon, A. G. |
| ADDME | Advantage Media Group |
| ADECY | Adecco, S. A. |
| ADEN | Aden Enterprises, Inc. |
| ADEX | A D E Corporation of Massachusetts |
| ADGI | American Diversified Group |