HDSI
| Acronym | Definition |
|---|---|
| HDSI | High Definition Serial Interface |
| HDSI | Hauts-De-Seine Initiative (est. 1999; Hauts-De-Seine, France) |
| HDSI | High-Density Station Interface |
| HDSI | Historical Diving Society Italia (Italian: The Italian Historical Diving Society) |
| HDSI | Hazardous Disposal Specialists, Inc. (est. 1991) |