| Abbreviation | Definition |
|---|---|
| DEBA | Devon Earth Building Association |
| DEBRA | The Distrophic Epidermolysis Bullosa Research Association |
| DESG | Defence Engineering and Science Group |
| DESSC | Digital Energy and Sustainability Solutions Campaign |
| DFI | Deep Foundations Institute |
| DFO | Dairy Farmers of Ontario |
| DGTA | Dutch Gas Turbine Association |
| DHANP | Diplomate of the Homeopathic Academy of Naturopathic Physicians |
| DHI | Door and Hardware Institute |
| DHt | Diplomate in Homeotherapeutics |
| DIAN | Dominantly Inherited Alzheimer Network |
| DIC | Destination Inspection Company |
| DICS | Destination Inspection Companies |
| DIK | Donation In Kind |
| DILA | Deaf Independent Living Association |
| DIS | Dutch International Society |
| DJVO | DJ Verification Organization |
| DLCA | Dallas Lactation Consultant Association |
| DLF | Designers Lighting Forum |
| DLF-NE | Designers Lighting Forum - New England |