| Acronym | Definition |
|---|
| RTSA➣Residential Treatment Services of Alamance (Burlington, NC) |
| RTSA➣Real Time Spectrum Analyzer |
| RTSA➣Railway Technical Society of Australasia (Australia) |
| RTSA➣Real-Time Spectrum Analyzer |
| RTSA➣Road Transport and Safety Agency (Zambia) |
| RTSA➣Real-Time Structured Analysis (notation) |
| RTSA➣Radio Tuning Software Application (aviation technology) |
| RTSA➣Real-Time Simulation and Animation (presentation software) |
| RTSA➣Real Time Situational Awareness |