| LIO | Lions International Organization | 利昂斯国际组织 |
| LIO | Limon, Costa Rica (Airport code) | 哥斯达黎加利蒙（机场代码） |
| LIO | Lock In/Lock Out | 在/锁锁 |
| LIO | Lesser Included Offense | 较轻罪行 |
| LIO | Load In/Out | 载荷/出 |
| LIO | Laser Indirect Ophthalmoscope | 激光间接检眼镜 |
| LIO | Local Intelligence Officers (England) | 当地情报官员（英格兰） |
| LIO | Low Intensity Operations | 低强度作业 |
| LIO | Lithium Organic (battery) | 有机锂（电池） |
| LIO | Limon, Costa Rica | 哥斯达黎加利蒙 |
| LIO | Low Input/Output (printers) | 较低的输入/输出(印刷) |
| LIO | Local Intelligence Officer | 当地情报官员 |
| LIO | left inferior oblique(muscle) | 左下斜肌 |
| LIO | Leadership Interdiction Operation | 领导层阻止操作 |
| LIO | Lon Input Output | Lon输入输出 |
| LIO | Line Input/ Output | 线路输入/输出 |