| OER | Oil Extended Rubber | 油充橡胶 |
| OER | Optical & Electronic Research, Inc. | 光学、电子有限公司创立于1996年 |
| OER | oxygen enhancement ratio | 氧气增强比 |
| OER | osmotic erythrocyte | 渗透性红细胞 |
| OER | Ornskoodsvik, Sweden | 瑞典Ornsoodsvik |
| OER | Optical & Electronic Research | 光学、电子方面的研究 |
| OER | Original Equipment Reproduction | 原始设备复制 |
| OER | Oxygen Evolution Reaction | 析氧反应 |
| OER | Office of Extramural Research | 校外研究办公室 |
| OER | Oil Extract Rate | 机油抽取率 |
| OER | Office of Energy Research | 能源研究办公室 |
| OER | Officer Effectiveness Report | 军官个人鉴定报告 |
| OER | Office of Educational Research | 教育研究办公室 |
| OER | Optimized Edge Routing | 优化的边缘路由 |
| OER | Orange Empire Railway | 橙色帝国铁路 |
| OER | Operating Experience Report/Review | 操作经验报告/审核 |
| OER | Order Entry Representative | 订单录入代表 |
| OER | Office of Exploratory Research | 探索研究办公室 |
| OER | Open Ended Response | 开放式响应 |
| OER | Officer Evaluation Report | 军官鉴定报告 |
| OER | Office of Environmental Restoration | 环境恢复办公室 |
| OER | operational electronic intelligence (ELINT) requirements (US DoD) | 作战电子情报（ELINT）要求（美国国防部） |
| OER | Open Educational Resources | 开放教育资源 |
| OER | Owners' Equivalent Rent | 业主等价租金 |
| OER | Odd-Even Rule | 奇偶规则 |
| OER | Office of Extramural Research (US NIH) | 校外研究办公室（美国国立卫生研究院） |
| OER | Operating Expense Ratio | 运营费用比率 |
| OER | Office of Emergency Response | 应急响应办公室 |
| OER | Organizational Efficiency Review | 组织效率审查 |
| OER | Officer Efficiency Report | 军官考绩报告 |