| Abbreviation | Definition |
|---|---|
| DCTI | Digital Courier Technologies Inc |
| DCTI | Distributed Computing Technologies Inc |
| DCTI | Diversified Chemical Technologies Inc |
| DCWC | Donald Cant Watts Corke |
| DCWI | Dembergh Construction Wyoming Inc |
| DDA | Demello D'entremont Associates |
| DDAI | David Douglas Associates Inc |
| DDAI | DELISLE DESPAUX et associés inc |
| DDAI | Digital Dynamics Audio Inc |
| DDAI | Directory Distributing Associates Inc |
| DDBE | Debra D. Burris Engineering, Inc. |
| DDC | Dallas Delta Corporation |
| DDC | Data Device Corporation |
| DDC | Domain Development Corp |
| DDC | Dominion Diamond Corporation |
| DDC | Dry Dock Corporation |
| DDCA | Danielle Dunn Creative Agency |
| DDCC | Dynamic Dance Competition Company |
| DDCL | Design Development Consultants Ltd |
| DDCL | Docklands Data Centre Ltd |