| REU | Reunion (ISO Country code) | 留尼汪(ISO国家代码) |
| REU | Reus, Spain - Reus (Airport Code) | 西班牙Reus-Reus(机场代码) |
| REU | RAID Expansion Unit (hardware description) | RAID扩展单元(硬件说明) |
| REU | Rated Exposure Unit | 额定曝光单位 |
| REU | Research Experience for Undergraduates | 本科生研究经历 |
| REU | Residential Equivalent Unit | 住宅当量单位 |
| REU | Research Experiences For Undergraduates | 本科生的研究经验 |
| REU | Radar Electronics Unit (developed by Lockheed Martin) | 雷达电子单元(由洛克希德·马丁公司开发) |
| REU | Reus, Spain | 西班牙Reus |
| REU | Remote Emitter Unit | 远程发射器单元 |
| REU | Research Experience For Undergrads | 本科生的研究经验 |
| REU | Regional Office for Europe | 欧洲区域办事处 |
| REU | Reunion Islands | 法属留尼汪岛 |
| REU | Radio Electronics Unit | 无线电电子单元 |