| Acronym | Definition |
|---|
| COSS | Certified Occupational Safety Specialist |
| COSS | Centre for Open Source Software |
| COSS | Common Object Services Specification |
| COSS | Cost of Service Study (various locations) |
| COSS | Corridors of Statewide Significance (Virginia Department of Transportation) |
| COSS | Consuls |
| COSS | Commercial Open Source Software (licensing status) |
| COSS | Carotid Occlusion Surgery Study |
| COSS | Councils of Social Services (New Zealand) |
| COSS | Cooperative Osteosarcoma Study Group |
| COSS | Controller of Site Safety (UK railway engineering) |
| COSS | Controller of Site Safety (Named supervisor of work gangs on UK railways) |
| COSS | Commissioner of Social Security |
| COSS | Co-Orbit Support Systems |
| COSS | Centaur Operations at the Space Station (NASA) |
| COSS | Crew On-orbit Support Systems (NASA) |
| COSS | Customer Oriented Strategic System |
| COSS | Contracts and Other Support Services (Federal Acquisition Regulation) |
| COSS | Contractor-Operated Storage Sites |
| COSS | Colorado Organization of Slalom Skateboarding |
| COSS | Commander's OPSEC Support System |
