| Abbreviation | Definition |
|---|---|
| DAJ | Daimler Benz, A. G. (now DCX = Daimler Chrysler) |
| DAL | Delta Air Lines, Inc. of Delaware |
| DAL | Delta Air Lines, Incorporated |
| DAP | Discount Auto Parts, Inc. |
| DBD | Diebold, Inc. |
| DBG | Dyersburg Corporation |
| DBS | Debt Strategies Fund, Inc. |
| DBS | Debt Strategies Fund, Incorporated |
| DBT | D B T Online, Inc. |
| DBU | Debt Strategies Fund III, Inc. |
| DCA | DQE Capital Corporation |
| DCI | Donaldson Company, Incorporated |
| DCI | Donaldson, Inc. |
| DCN | Dana Corporation |
| DCO | Ducommun, Inc., of Delaware |
| DCO | Ducommun, Incorporated |
| DCR | Duff Phelps Credit Rating Company (now de-listed) |
| DCR | Duff & Phelps Credit Rating Company (now de-listed) |
| DCS | Doncasters, P. L. C. |
| DCX | DaimlerChrysler, A. G. |