| Abbreviation | Definition |
|---|---|
| DC | Delray Connecting Railroad Company |
| DCAX | Tarmac Florida |
| DCAX | Tarmac Florida, Incorporated |
| DCBX | Degussa Corporation |
| DCBX | DeGussa Engineered Carbons |
| DCCU | Dow Corning Corporation |
| DCCX | McDonnell Douglas Corporation |
| DCFB | Dodge City Ford and Bucklin Railroad Company Incorporated |
| DCFX | PLM International |
| DCFX | PLM International Incorporated |
| DCI | Des Moines and Central Iowa |
| DCIU | Dana Container |
| DCIU | Dana Container Incorporated |
| DCIX | Danella Construction Corporation |
| DCLR | Delaware Coast Line Railroad |
| DCLR | Delaware Coastline Railroad |
| DCLU | Dutch Container Leasing |
| DCLU | Dutch Container Leasing, B. V. |
| DCLX | Dow Chemical Canada Incorporated |
| DCLX | Procor Ltd. (Dow Chemical Canada) |