| ISAG | Independent Space Advisory Group | 独立空间咨询小组 |
| ISAG | Information Systems Activity Group | 信息系统活动组 |
| ISAG | Inter-Service Antenna Group | 服务间天线总成 |
| ISAG | Independent Strategic Assessment Group (Missile Defense Agency) | 独立战略评估小组（导弹防御局） |
| ISAG | It Is All Good | 一切都很好 |
| ISAG | IGOSS Scientific Advisory Group | IGOSS科学咨询小组 |
| ISAG | International Society for Animal Genetics | 国际动物遗传学学会 |
| ISAG | International Symposium on Andean Geodynamics | 安第斯地球动力学国际研讨会 |