| Acronym | Definition |
|---|
| ORIS➣Office of Research Information Systems (various universities) |
| ORIS➣Operating Room Information System |
| ORIS➣Office of Regulatory Information Systems |
| ORIS➣Ord River Irrigation Scheme (Australia) |
| ORIS➣Office of Research and Information Services (Canada) |
| ORIS➣Operational Range Inventory Sustainment |