| NIRS | Near Infrared Spectroscopy | 近红外光谱学 |
| NIRS | National Institute on Retirement Security (Washington, DC) | 国家退休保障研究所（华盛顿特区） |
| NIRS | National Information and Reporting System | 国家信息和报告系统 |
| NIRS | National Informatics Recognition System | 国家信息识别系统 |
| NIRS | National Institute of Radiological Science | 国家放射科学研究所 |
| NIRS | Nuclear Information and Resource Service | 核信息与资源处 |
| NIRS | National Irrigation Research Station (Zambia) | 国家灌溉研究站（赞比亚） |
| NIRS | Navy Implementation for Raster Scanning | Navy光栅扫描的实现 |
| NIRS | Near-Infrared Reflectance Spectroscopy | 近红外反射光谱 |
| NIRS | Non-Increasing Returns to Scale | 规模回报率不增加 |
| NIRS | Non- Invasive Research System | 非侵入性研究系统 |
| NIRS | National Institute of Radiological Sciences | 国家放射科学研究所 |