| Acronym | Definition |
|---|
| RIWG➣Regional Issues Working Group (now Oil Sands Developers Group; Canada) |
| RIWG➣Regional Infrastructure Working Group (Standing Committee on Regional Development; Australia) |
| RIWG➣Rhode Island Wing (Civil Air Patrol) |
| RIWG➣Regional Initiatives Working Group (Australia) |
| RIWG➣Requirements Integration Working Group |