| Acronym | Definition |
|---|
| ROSA | Receive Optical Subassemblies |
| ROSA | Romanian Space Agency |
| ROSA | Receiver Optical Sub Assembly |
| ROSA | Rapid One Step Assay (food safety) |
| ROSA | Reverse Osmosis System Analysis (design software program; Dow Water and Process Solutions) |
| ROSA | Rig of Safety Assessment |
| ROSA | Realistic Open Security Architecture |
| ROSA | Regional Ozone Study Area (EPA) |
| ROSA | Regional Office for South Africa (IUCN) |
| ROSA | Rotorcraft Open Systems Avionics |
| ROSA | Report of Serious Accident (USACE) |
| ROSA | Radar Open Systems Architecture |
| ROSA | Registry of Sidereal Astrologers |
| ROSA | Rotorcraft Open Systems Architecture |
| ROSA | Regional Office Security Administrator |
| ROSA | Report Of Survey Activity |
| ROSA | Report of Supply Activity |
| ROSA | Reconstructing Obsolete System Architecture |