| Acronym | Definition |
|---|
| DDSD➣Developmental Disabilities Services Division |
| DDSD➣Delta Diablo Sanitation District (Antioch, CA) |
| DDSD➣David Douglas School District (Portland, Oregon) |
| DDSD➣Delay Dial Start Dial |
| DDSD➣Daily Dry Soil Dose (crops) |
| DDSD➣Detroit Day School for the Deaf (Detroit, MI) |
| DDSD➣Delta Dental of South Dakota (est. 1963; Pierre, SD) |