| Acronym | Definition |
|---|
| MTSA➣Multiple Time Series Analysis (marketing) |
| MTSA➣Marine Transportation Security Act (Canada) |
| MTSA➣Middle Tennessee School of Anesthesia (Madison, TN) |
| MTSA➣Military Training Specific Allotment |
| MTSA➣Minnesota Transport Services Association |
| MTSA➣McCandless Township Sanitary Authority (Pennsylvania) |
| MTSA➣Master Teachers by Satellite for Afghanistan (educational program) |
| MTSA➣Master Transit Services Agreement (Fluxys; Belgium) |
| MTSA➣Medical Tourism Association of South Africa |
| MTSA➣Seaman Apprentice, Missile Technician Striker (Naval rating) |
| MTSA➣Multi Technical Services Arnhem (Arnhem, The Netherlands) |