| IMACS | International Association for Mathematics and Computers in Simulation | 国际数学和计算机模拟协会 |
| IMACS | Integrated Monitoring Alarm & Control System (Australian military vessels) | 综合监测报警电路及控制系统(澳大利亚的军事船) |
| IMACS | Inamori Magellan Areal Camera and Spectrograph | 稻盛·麦哲伦区域照相机和光谱仪 |
| IMACS | Integrated Multiple Access Communications Server | 集成多址通信服务器 |
| IMACS | Interservice Material Accounting and Control System | 军种间物料核算和控制系统 |