HSDP
| 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) |