| ORA | FDA Office of Regulatory Affairs | (美国)FDA监管事务办公室 |
| ORA | Orlando Rowing Association | 奥兰多划船协会 |
| ORA | Ontario Rifle Association | 安大略省步枪协会 |
| ORA | Orthopaedic Rehabilitation Association | 骨科康复协会 |
| ORA | Optical Research Associates | 光学研究协会 |
| ORA | Ontario Rodeo Association | 安大略省竞技体育协会 |
| ORA | Oregon Rehabilitation Association | 俄勒冈州康复协会 |
| ORA | Oklahoma Rifle Association (Yukon, OK) | 俄克拉荷马州步枪协会（俄勒冈州育空） |
| ORA | Ontario Racing Association | 安大略省赛车协会 |
| ORA | Office of Research and Applications (NOAA) | 研究和应用办公室（NOAA） |
| ORA | OR with Accumulator (6502 processor instruction) | 带累加器的OR（6502处理器指令） |
| ORA | Office of Research Analysis | 研究分析处 |
| ORA | Order of the Red Army | 红军命令 |
| ORA | Office of Regulatory Affairs | 监管事务办公室 |
| ORA | OrganizaciÓn Revolucionaria Anarquista (Spanish: Anarchist Revolutionary Organization, Argentina) | OrganizaciÓn Revolucionaria Anarquista (Spanish: Anarchist Revolutionary Organization, Argentina) |
| ORA | Operations Research Analyst | 运营研究分析师 |
| ORA | Office of Ratepayers Advocates (California) | 差饷律师事务所（加利福尼亚州） |
| ORA | Organizational Registration Authority | 组织登记机构 |
| ORA | Operational Requirements Analysis | 作战需求分析 |
| ORA | Obsolete or Redundant Acronym (humor) | 过时或多余的首字母缩写（幽默） |
| ORA | Open Records Act | 开放记录法案 |
| ORA | Output Response Analyzer | 输出响应分析仪 |
| ORA | Optimal Rate Allocation | 最优费率分配 |
| ORA | Operational Risk Assessment | 运营风险评估 |
| ORA | Organizational Research Analyst | 组织研究分析员 |
| ORA | Online Retail Awards | 在线零售奖 |
| ORA | Office of Research Affairs | 研究事务办公室 |
| ORA | Optical Raman Amplification | 光学拉曼放大 |
| ORA | Office of Review & Appeals | 办公室的回顾和上诉 |
| ORA | Offshore Risk Assessment | 海上风险评估 |
| ORA | OrganizaciÓn Revolucionaria Anarquista | OrganizaciÓn Revolucionaria Anarquista |
| ORA | Organization for the Resolution of Agunot, Inc. | Agunot公司决议组织。 |
| ORA | Operational Readiness Assessment | 战备状况评估 |
| ORA | Office of Research and Applications | 研究和应用办公室 |
| ORA | Optical Reference Assembly | 光学参考组件 |
| ORA | Oscillator Rectifier And Amplifier | 振荡器整流器和放大器 |
| ORA | Office Of Resource Assistance | 资源援助办公室 |
| ORA | Outer Rhabdomeres Absent | 外横纹肌缺失 |
| ORA | Parameter file (Oracle) | 参数文件（Oracle） |
| ORA | Oran, Santa Ana, Argentina | 阿根廷圣安娜奥兰 |
| ORA | Ormet Railroad Corporation | Ormet铁路公司 |
| ORA | Outdoor Resorts Of America | 美国户外度假胜地 |