| OTSR | Omni Transmit Sector Receive | 全向发射扇区接收 |
| OTSR | Optimum Track Ship Routing | 最佳跟踪舰船航线 |
| OTSR | Other Than Selected Reserve (US Air Force) | 非选定预备役（美国空军） |
| OTSR | Office of Transportation Security Redress (US Transportation Security Administration) | 运输安全补救办公室（美国运输安全管理局） |
| OTSR | Over The Shoulder Restraints (amusement rides) | 肩上约束装置（游乐设施） |
| OTSR | Ornamental Transplant Soil and Root inoculants (mycorrhizae inoculants for horticultural use) | 观赏移植土壤和根接种剂（园艺用菌根接种剂） |