| DDSO | Delco Defense Systems Operations 
| Others |
| DDSO | Developmental Disabilities Service Office
| Others |
| DDSO | Developmental Disabilities Service Organization
| Others |
| DDSO | Developmental Disabilities Services Office
| Others |
| DDSO | Developmental Disablities Services Organization
| Others |
| DDSO | Developmentally Disabled Service Offices
| Others |
| DDSO | Disability Development and Support Officer
| Others |
| DDSO | Double Discovery Student Organization
| Others |