| WTSA | Washington Technology Student Association 
| Others |
| WTSA | Weapons Technician Apprentice
| Others |
| WTSA | West Texas Speech Association
| Others |
| WTSA | Westbound Transpacific Stabilization Agreement
| Others |
| WTSA | Western Thoracic Surgical Association
| Others |
| WTSA | Wisconsin Chapter - Tourette Syndrome Association
| Others |
| WTSA | World Telecommunication Standardization Assembly
| Others |
| WTSA | world Telecommunications Standardization Assembly
| Others |