| ISAR | Improving Business Fundamentals、Sustainability、Attractive Relative Valuation、Rising Expectations | 信安ISAR模型 |
| ISAR | Initial Sample Approval Request | 首批样品认可 |
| ISAR | Internet Standards Assessment Report (Web Marketing Association) | 互联网标准评估报告（网络营销协会） |
| ISAR | International Society for Animal Rights | 国际动物权利协会 |
| ISAR | Inverse Sidelooking Airborne Radar | 反向侧视机载雷达 |
| ISAR | Institut des Sciences Agronomiques du Rwanda | 卢旺达农业科学研究所 |
| ISAR | Information Systems and Research, Inc. (Fairfax, VA) | 信息系统与研究公司（弗吉尼亚州费尔法克斯） |
| ISAR | International Society for Antiviral Research | 抗病毒研究国际社会 |
| ISAR | International Symposium on Augmented Reality | 增强现实国际研讨会 |
| ISAR | Inverse Synthetic-Aperture Radar | 逆合成孔径雷达 |
| ISAR | Industry Safety Accident Rating | 行业安全事故评级 |
| ISAR | International Standards of Accounting and Reporting | 国际会计和报告准则 |
| ISAR | Integrated Safety Analysis Report | 综合安全分析报告 |
| ISAR | Interferometric Synthetic Aperture Radar (INSAR) | 干涉合成孔径雷达（INSAR） |
| ISAR | Information Storage & Retrieval | 信息存储和检索 |
| ISAR | Inverse Synthetic Aperture Radar | 逆合成孔径雷达 |