| Acronym | Definition |
|---|
| ATSM➣At The Same Time |
| ATSM➣Acute Traumatic Stress Management |
| ATSM➣Advanced Terminal Session Management (Stay-Linked) |
| ATSM➣Association Tunisienne des Sciences Mathématiques (French: Tunisian Association of Mathematical Sciences; Tunisia) |
| ATSM➣Athletic Training/Sports Medicine (academic program; various locations) |
| ATSM➣Area Technical Support Manager |
| ATSM➣Ateliers de Tolerie et de Serrurerie de Montreuil (French: Body Shop and Locksmith Montreuil; Montreuil, France) |
| ATSM➣Automatic Threshold Selection Method (radiology) |
| ATSM➣Association des Techniciens Supérieurs du Mobilier (French: Furniture Technicians Association; est. 1990) |
| ATSM➣Autorails Touristiques Seine et Marnais (French: Seine et Marne Tourist Railcars; Siene et Marne, France) |