| RLO | Return Letter Office | 回函办公室 |
| RLO | Reduced Light Output | 减少光输出 |
| RLO | Records Liaison Officer | 记录联络官 |
| RLO | Restoration Liaison Officer | 修复联络官 |
| RLO | Recovery Level Objective (business continuity management) | 恢复级别目标（业务连续性管理） |
| RLO | Resident Liaison Officer (UK) | 驻地联络官（英国） |
| RLO | Richland Operations (US DOE) | Richland运营（美国能源部） |
| RLO | Reusable Learning Object | 可重用学习对象 |
| RLO | residual lymphocyte output | 残余淋巴细胞输出 |
| RLO | Related Learning Opportunity | 相关学习机会 |
| RLO | rickettsia-like organism | 立克次体样生物 |
| RLO | Radar Lock-On | 雷达锁定开启 |
| RLO | Resident Liaison Officer | 驻地联络官 |
| RLO | Residence Life Office | 住宅生活办公室 |
| RLO | Real Live Officer | 真正的现场官员 |
| RLO | Range Liaison Officer | 靶场联络官 |
| RLO | Restricted Life Option | 限制生命选项 |
| RLO | Reserve Liaison Officer | 后备联络官 |
| RLO | Rosa-Luxemburg-Oberschule Berlin (Germany) | Rosa Luxemburg Oberschule Berlin（德国） |
| RLO | Regional Liaison Office | 区域联络办公室 |
| RLO | Right-to-Left Override | 从右向左覆盖 |
| RLO | Result of the Logical Operation (Programmable Logic Controller programming) | 逻辑操作结果（可编程逻辑控制器编程） |