| USSA | The U.S. Ski and Snowboard Association 
| Others |
| USSA | Ultimate Safety Solutions Australia Ltd
| Others |
| USSA | Uniformed Services Society of Anesthesiologists
| Others |
| USSA | Union of Socialist States of America
| Others |
| USSA | United Service Systems Of America
| Others |
| USSA | United Socialist States of America
| Others |
| USSA | United Soviet States of America
| Others |
| USSA | United Special Sportsman Alliance
| Others |
| USSA | United Special Sportsmen Alliance
| Others |
| USSA | United States Sailing Association
| Others |
| USSA | United States Shooting Academy
| Others |
| USSA | United States Shuffleboard Association
| Others |
| USSA | United States Ski And
| Others |
| USSA | United States Ski and Snowboard Association
| Others |
| USSA | UNITED STATES SKI Association
| Others |
| USSA | United States Snooker Association
| Others |
| USSA | United States Snowmobile Association
| Others |
| USSA | United States Snowsport Association
| Others |
| USSA | United States Space Administration
| Others |
| USSA | United States Speed Association
| Others |
| USSA | United States Sports Academy
| Others |
| USSA | United States Sportsmen's Alliance
| Others |
| USSA | United States Student Association
| Others |
| USSA | United Suburban Schools Association
| Others |
| USSA | United Suffolk Sheep Association
| Others |
| USSA | University of Strathclyde Students' Association
| Others |
| USSA | University Sports South Africa
| Others |