| Acronym | Definition |
|---|
| ORRA➣Orlando Regional Realtor Association |
| ORRA➣Oak Ridge Rowing Association |
| ORRA➣Off-Road Radio Association |
| ORRA➣Ontario Road Riders Association |
| ORRA➣Oriental Rug Retailers of America, Inc. |
| ORRA➣Oregon Refuse & Recycling Association |
| ORRA➣Optimum Route/Resource Allocation (Fujitsu) |
| ORRA➣Olympic Renewable Resources Association |
| ORRA➣Out-Reach Rainbow Alliance |
| ORRA➣Orewa Ratepayers & Residents Association (Orewa, Hibiscus Coast, Rodney District, New Zealand) |