| 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) |