| Rank | Abbreviation | Meaning |
|---|
| ***** | HTSA | Host-Tenant Support Agreement
| |
| ***** | HTSA | Harvard Taiwanese Students Association
| |
| ***** | HTSA | Home Theater Specialists of America
| |
| ***** | HTSA | Seaman Apprentice, Hull Maintenance Technician Striker
| |
| **** | HTSA | Heat Treat System Assessment
| |
| **** | HTSA | Highway Traffic Safety Administration
| |
| **** | HTSA | High-Temperature Solar Array
| |
| **** | HTSA | Houma Terrebonne Soccer Association
| |
| **** | HTSA | History Trust of South Australia
| |
| **** | HTSA | human thyroid-stimulating activity
| |
| **** | HTSA | Home Technology Specialists of America
| |
| *** | HTSA | Home Theatre Specialists of America
| |
| ** | HTSA | Harmonized Tariff System Annotated
| |
| ** | HTSA | Holy Trinity School Association
| |
| ** | HTSA | High Throughput Screening Assay
| |
| * | HTSA | Heavy Tool Support Arm
| |
| * | HTSA | Hindu Temple of San Antonio
| |
| * | HTSA | Huddersfield Town Supporters Association
| |