| Acronym | Definition |
|---|
| ORBA➣Off-Road Business Association |
| ORBA➣Ontario Road Builders Association (Canada) |
| ORBA➣Orchard Road Business Association (Singapore) |
| ORBA➣Object Request Broker Architecture |
| ORBA➣Ostrow Reisin Berk & Abrams, Ltd |
| ORBA➣Oak Ridge Bridge Association (Oak Ridge, TN) |
| ORBA➣Oak Ridge Business Association (Oak Ridge, TN) |
| ORBA➣Oregon Restaurant and Beverage Association |
| ORBA➣Ocoee Region Builders Association (Cleveland, TN) |
| ORBA➣Osgoode-Rideau Basketball Association |
| ORBA➣Optimized Reduced Basis Approximation |
| ORBA➣Optimal Recovery Balance Analysis |
| ORBA➣OLIBS Replicating Breeders Association |
| ORBA➣Official Referees Bar Association |
| ORBA➣Oxford Recreational Baseball Association (Oxford, MI) |