| Acronym | Definition |
|---|
| ATSO➣Antalya Ticaret ve Sanayi Odasi (Turkish: Antalya Chamber of Commerce; Antalya, Turkey) |
| ATSO➣Australian Technical Standard Order (Civilian Aviation Safety Authority; Australia) |
| ATSO➣Air Traffic Service Organization (ICAO) |
| ATSO➣Ability To Survive & Operate |
| ATSO➣Association of Tattoo Studio Owners |
| ATSO➣Advanced Technology and Software Operations Office |
| ATSO➣Anatolia Turkish Student Organization (Michigan State University; East Lansing, MI) |