| OR | Operation Record | 操作[运行]记录 |
| OR | Operations Requirement | 操作[运行]要求 |
| OR | Oregon | 俄勒冈 |
| OR | Operating room | 手术室;操作室 |
| OR | Operational Research | 运筹学 |
| OR | Order Register | 指令寄存器 |
| OR | Out of Range | 在射程之外 |
| OR | Output Register | 输出寄存器 |
| OR | Outside Radius | 外半径 |
| OR | Overload Relay | 过载继电器 |
| OR | Owner's Risk | 损失由货主承担(海运业用语) |
| OR | Object Repository | 对象库 |
| OR | Octane Requirements | 辛烷值要求 |
| OR | Omega Rho (honors society for Operations Researchers) | Omega Rho（荣誉运营研究人员协会） |
| OR | Outdoor Research | 户外研究 |
| OR | Osservatore Romano (Vatican newapaper) | Osservatore Romano（梵蒂冈新报纸） |
| OR | Orange Range (Japanese rock band) | 橙色范围（日本摇滚乐队） |
| OR | Optical Router | 光路由器 |
| OR | Object Reuse | 对象重用 |
| OR | Outside Rehearsals | 室外排练 |
| OR | Object Recognition | 对象识别 |
| OR | Only Replication/Replicating | 只有复制/复制 |
| OR | Outward Routing | 向外路由 |
| OR | On Request | 应要求 |
| OR | Object Reference (CORBA) | 对象引用（CORBA） |
| OR | O-Ring | O形密封圈 |
| OR | Orthogonal Region | 正交区域 |
| OR | Overall Resistance | 整体阻力 |
| OR | Organized Rhyme (rap group) | 有组织的押韵（说唱组） |
| OR | Official Records (Of the American Civil War; historical citations) | 官方记录（美国内战；历史引用） |
| OR | Ordnance Requirement | 军械需求 |
| OR | Owasco River Railroad | 奥瓦斯科河铁路 |
| OR | Operations Resources | 运营资源 |
| OR | Observed Ratio | 观察到的比率 |
| OR | oral rehydration | 口服补液 |
| OR | optimal radiotherapy | 最佳放射治疗 |
| OR | opiate receptor | 阿片受体 |
| OR | Logical OR | 逻辑OR |
| OR | orthopaedic research | 整形外科研究 |
| OR | Odds Ratio | 赔率 |
| OR | oxidation-reduction | 氧化还原 |
| OR | orientation reflex | 定向反射 |
| OR | Office Regenerator | 办公室再生器 |
| OR | Ondernemingsraad | Onderemingsraad公司 |
| OR | optic radiation | 光学辐射 |
| OR | Open Reduction | 开放式还原 |
| OR | oral ritodrine | 口服利托林 |
| OR | Oriented | 面向......的 |
| OR | oxidized-reduced | 氧化还原的 |
| OR | optic recess | 视神经隐窝 |
| OR | orthopaedic(surgeon) | 整形外科（外科医生） |
| OR | orbital rhabdomyosarcoma | 眼眶横纹肌肉瘤 |
| OR | oil retention | 油滞留率 |
| OR | Optimal Routing (telecom) | 最佳路由（电信） |
| OR | Open Repositories (Conference) | 开放存储库（会议） |
| OR | Open Root (welding) | 开口根部（焊接） |
| OR | Operational Requirement | 操作要求 |
| OR | Operating Reactor | 操作反应堆 |
| OR | Operational Readiness | 作战准备就绪 |
| OR | Onion Routing | 洋葱路由 |
| OR | Olympic Record | 奥林匹克纪录 |
| OR | Own Recognizance | 自己的认可 |
| OR | Occurrence Report | 发生情况报告 |
| OR | Other Ranks (British military) | 其他军衔（英国军队） |
| OR | Operations Room | 手术室 |
| OR | Oak Ridge | 橡树岭 |
| OR | Operating Range | 工作范围 |
| OR | Outreach | 外展服务 |
| OR | Operational Reserve | 业务准备金 |
| OR | Onion Ring | 洋葱戒指 |
| OR | Old Ruymian (alumni of Chatham House Grammar School for boys, Ramsgate, Kent, UK) | Old Ruymian（英国肯特郡拉姆斯盖特查塔姆学院男生文法学校校友） |
| OR | Ontario Reports | 安大略判例汇编 |
| OR | Outward Radial | 向外径向 |
| OR | Odds Ratio (element of statistical regression analysis, science) | 比值（统计回归分析要素，科学） |
| OR | Ordinary Proton (event) | 普通质子（事件） |
| OR | Open Repair | 打开修复 |
| OR | Object to Relational | 对象到关系 |
| OR | Officer Representative | 高级职员代表 |
| OR | Oristano, Sardegna (Italian province) | 奥里斯塔诺，萨尔代格纳（意大利省） |
| OR | Operations Requirements | 活动要求 |
| OR | Omani Rial (national currency) | 阿曼里亚尔（本国货币） |
| OR | Operationally Ready | 运行就绪 |
| OR | Objective Response | 客观回应 |
| OR | Organization Administrator | 组织管理员 |
| OR | Orgone (energy) | Orgone（能量） |
| OR | Office of Record | 记录办公室 |
| OR | Over Rate (cricket scoring) | 超额率（板球得分） |
| OR | Offensive Rebound (basketball) | 进攻篮板（篮球） |
| OR | Oxygen Reduction | 氧气还原 |
| OR | Official Receipt | 正式收据 |
| OR | Oregon (US postal abbreviation) | 俄勒冈州（美国邮政缩写） |
| OR | Operational Review | 运营审查 |
| OR | Operations Research | 运筹学 |
| OR | Originator / Recipient | 汇款/接收 |
| OR | Owner's Risk | 损失由货主承担(海运业用语) |
| OR | Omnidirectional Range | 全向范围 |
| OR | Operational Reliability | 运行可靠性 |