| Abbreviation | Definition |
|---|---|
| DAIO | Data I O Corporation |
| DAKT | Daktronics, Inc. |
| DALN | Daleen Technologies |
| DANKY | Danka Business Systems, P. L. C. |
| DANS | Danskin, Inc. |
| DAOU | D A O U Systems, Inc. |
| DASTY | Dassault Systems, S. A. |
| DASYV | Dassault Systems, S. A. When Issued |
| DATA | Datatrak International, Inc. |
| DATC | Datatec Systems, Inc. |
| DATM | Datum, Inc. |
| DATX | Data Translation, Inc. |
| DATXD | Data Translation, Inc. |
| DAVE | Famous Daves of America |
| DAVL | Davel Communications, Inc. |
| DAVX | Davox Corporation |
| DAWH | David White, Inc. |
| DAWK | Daw Technologies, Inc. |
| DAWN | Dawn Technologies, Inc. |
| DAYPO | Dayton Power & Light Company |