| Acronym | Definition |
|---|
| IMMS | International Marine Minerals Society (Honolulu, HI) |
| IMMS | International Military Music Society |
| IMMS | Integrated Marine Monitoring System (various organizations) |
| IMMS | Insurance Marketing and Management Services |
| IMMS | International Money Management System (various companies) |
| IMMS | Integrated Maintenance Management System |
| IMMS | Information Model Management Service (service availability forum) |
| IMMS | Intermediate Maintenance Activity Maintenance Management Subsystem |
| IMMS | Installation Maintenance Management System |
| IMMS | Interim Maintenance Management System |