| Acronym | Definition |
|---|
| HDAP➣HIV Drug Assistance Program (various locations) |
| HDAP➣High Definition Audio Performance (stationary receiver) |
| HDAP➣Housing Development Assistance Program (Ohio Housing Finance Authority; Columbus, OH) |
| HDAP➣Human Development and Applied Psychology |
| HDAP➣Heavy-Duty All-Purpose (tires) |
| HDAP➣Histochemically Demonstrable Alkaline Phosphatase (pathology) |