| Acronym | Definition |
|---|
| IMACS➣International Association for Mathematics and Computers in Simulation |
| IMACS➣Image Management and Communication System |
| IMACS➣Inamori Magellan Areal Camera and Spectrograph |
| IMACS➣Integrated Multiple Access Communications Server |
| IMACS➣Interservice Material Accounting and Control System |
| IMACS➣Integrated Monitoring Alarm & Control System (Australian military vessels) |