| RNL | radionuclide lymphoscintigraphy | 放射性核素淋巴显像 |
| RNL | Receipt Notification Letter | 接收通知函 |
| RNL | Required New Line | 所需新行 |
| RNL | Roll-N-Lock Corporation | Roll-N-Lock公司 |
| RNL | Resistance and Liberation | 抵抗与解放 |
| RNL | Rendering with Natural Light | 使用自然光渲染 |
| RNL | Refit Notification Letter | 改装通知函 |
| RNL | Rennell Island, Solomon Islands | 所罗门群岛伦内尔岛 |
| RNL | Round Nosed Lead (ammunition) | 圆鼻铅（弹药） |
| RNL | Revolution in Naval Logistics | 海军后勤革命 |
| RNL | Resistance and Liberation (gaming) | 抵抗与解放（游戏） |
| RNL | Rede das Novas Licenciaturas (Portugese) | 新许可证（葡萄牙语） |