COSSA
| Acronym | Definition |
|---|---|
| COSSA | Consortium of Social Science Associations (Washington, DC) |
| COSSA | Commission on Spanish Speaking Affairs (Michigan Department of Energy, Labor and Economic Growth; Lansing, MI) |
| COSSA | Central Oregon Shooting Sports Association (Bend, OR) |
| COSSA | Containerized Shipment and Storage of Ammunition |
| COSSA | Computer Science Students Association |
| COSSA | CSIRO (Commonwealth Scientific and Industrial Research Organisation) Office of Space Science & Applications (Australia) |