| Acronym | Definition |
|---|
| HSDP➣Hawaii Scientific Drilling Project |
| HSDP➣High School Diploma Program |
| HSDP➣Hrvatski Savez Daljinskog Plivanja (Croatian Long Distance Swimming Federation) |
| HSDP➣Hungarian Social Democratic Party |
| HSDP➣Hanford Site Development Plan |
| HSDP➣Health Systems Development Programme (various locations) |