HAPP
| Acronym | Definition |
|---|---|
| HAPP | Host Application |
| HAPP | Housing Assistance Payments Program (various locations) |
| HAPP | Human Amyloid Precursor Protein |
| HAPP | Hydraulically Activated Pipeline Pigging (engineering) |
| HAPP | Human Amyloid Protein Precursor |
| HAPP | HIV/AIDS Prevention Program (various locations) |
| HAPP | Health Administration and Policy Program (University of Maryland, Baltimore County) |
| HAPP | Heavy Alloy Penetration Project |