| MSIR | Master of Science in Industrial Relations | 工业关系理学硕士 |
| MSIR | Morphine Sulphate Instant Release | 硫酸吗啡即时释放 |
| MSIR | Master of Science in International Relations | 国际关系科学硕士 |
| MSIR | Markov Switching Imperfect Repair (reliability model) | 马尔可夫切换不完全修复（可靠性模型） |
| MSIR | Master Stock Item Record | 主库存项目记录 |
| MSIR | Maximum Signal-to-Interference Ratio | 最大信干比 |
| MSIR | Master Stock Inventory Record | 主库存记录 |
| MSIR | Middle School Instructional Resource | 中学教学资源 |