| Acronym | Definition |
|---|
| HSDC➣High Speed Daughter Card |
| HSDC➣Hubbard Street Dance Chicago (Illinois) |
| HSDC➣Hearing, Speech & Deafness Center (Washington) |
| HSDC➣High-Speed Data Communications |
| HSDC➣High-Speed Data Card |
| HSDC➣High School Design Competition (architecture competition) |
| HSDC➣High Speed Digital Chart |
| HSDC➣Homeland Security Defense Coalition (professional development and continuing education programs) |