| ISMS | Image Store Management System | 图像存储管理系统 |
| ISMS | International Symposium on the Morphological Sciences | 形态科学国际研讨会 |
| ISMS | Illinois State Medical Society | 伊利诺伊州医学会 |
| ISMS | Indian Society for Medical Statistics | 印度医学统计学会 |
| ISMS | Integrated Safety Management System | 综合安全管理系统 |
| ISMS | Information Security Management System | 信息安全管理系统 |
| ISMS | Integrated Environmental, Safety, and Health Management System | 综合环境、安全和健康管理系统 |
| ISMS | In-flight Safety Monitoring System | 飞行安全监控系统 |
| ISMS | Integrated Survivability Management System (NAVSEA) | 综合生存能力管理系统（NAVSEA） |