| Acronym | Definition |
|---|
| ORA | Office of Research and Applications (US NOAA) |
| ORA | Office of Regulatory Affairs |
| ORA | Optical Research Associates |
| ORA | Obligations Remboursables en Actions (French: Bonds Reimbursable in Shares) |
| ORA | Oracle |
| ORA | or with Accumulator |
| ORA | Output Register a |
| ORA | Outstanding Research Award (various organizations) |
| ORA | O'Reilly Associates (various organizations) |
| ORA | Office of Research Affairs |
| ORA | Open Records Act |
| ORA | Oil Region Alliance (Oil City, PA) |
| ORA | Office of Rent Administration (New York) |
| ORA | Online Reading Assessment |
| ORA | Operations Research Analyst |
| ORA | Operational Risk Assessment |
| ORA | Oregon Rehabilitation Association |
| ORA | Office of Regional Affairs |
| ORA | Organizational Registration Authority |
| ORA | Operational Readiness Assessment |
| ORA | Output Response Analyzer |
| ORA | Opioid Receptor Agonist (neurophysiology) |
| ORA | Organización Revolucionaria Anarquista (Spanish: Anarchist Revolutionary Organization, Argentina) |
| ORA | Optimal Rate Allocation |
| ORA | OR with Accumulator (6502 processor instruction) |
| ORA | Orthopaedic Rehabilitation Association |
| ORA | Ontario Rifle Association |
| ORA | Oklahoma Rifle Association (Yukon, OK) |
| ORA | Organization de Resistance de l'Armée (French: Organization Resistance Army) |
| ORA | Orth-Rodgers Associates (Mechanicsburg, PA) |
| ORA | Office of Ratepayers Advocates (California) |
| ORA | Ontario Rodeo Association |
| ORA | Office of Research Analysis |
| ORA | Operational Requirements Analysis |
| ORA | Organization for the Resolution of Agunot, Inc. |
| ORA | Obsolete or Redundant Acronym (humor) |
| ORA | Optical Reference Assembly |
| ORA | Office of Review & Appeals |
| ORA | Order of the Red Army |
| ORA | Orlando Rowing Association |
| ORA | Optical Raman Amplification |