| Abbreviation | Definition |
|---|---|
| DVS | Delta Valley and Southern Railway Company |
| DVSZ | Delta Valley and Southern Railway |
| DVSZ | Delta Valley and Southern Railway Company |
| DVTX | SULCOM |
| DVZU | Constructora Subacuatica Diavaz |
| DW | Detroit and Western |
| DWAU | Degussa Antwerpen |
| DWAU | Degussa Antwerpen NV |
| DWC | Canadian National Railway |
| DWC | Duluth, Winnipeg and Pacific Railway (Canadian National Railway) |
| DWCX | David Witherspoon |
| DWCX | David Witherspoon Incorporated |
| DWML | Due West Motor Line |
| DWP | Duluth Winnipeg and Pacific Railway |
| DWP | Duluth, Winnipeg and Pacific Railway (Canadian National Railway) |
| DXCU | Coast Storage & Containers |
| DYLX | Ronald L. Boothman Remainder Trust |
| DYLX | Transportation Equipment Incorporated |
| DYNX | Dyno Nobel |
| DYNX | Dyno Nobel Incorporated |