| Abbreviation | Definition |
|---|---|
| HSNA | Harvard Square Neighborhood Association |
| HSNA | Hawaii State Numismatic Association |
| HSNA | Health Sciences Networking Association |
| HSNA | Heart of Sumter Neighborhood Association |
| HSNA | Highland Square Neighborhood Association |
| HSNA | Highlands Of Seminole Neighborhood Association |
| HSNA | Hispanic Student Nursing Association |
| HSNA | Historic Southwest Neighborhood Association |
| HSNA | Hope Student Nurses Association |
| HSPA | Hawaiian Sugar Planters' Association |
| HSPA | Hoosier State Press Association |
| HSSA | Health Sciences Student Association |
| HSSA | Health Sciences Students Association |
| HSSA | High School Soccer Association |
| HSSA | Human Services Student Association |
| HSTA | Hawaii State Teachers Association |
| HTA | Harbor Trucking Association |
| HTA | Heavy Transport Association |
| HTA | High Tech Association |
| HTA | Home Technology Association |