| Acronym | Definition |
|---|
| ICMS | Imposto Sobre Circulação de Mercadorias e Serviços (Brazilian excise tax) |
| ICMS | International Centre for Mathematical Sciences |
| ICMS | International Committee for Museum Security |
| ICMS | Integrated Customer Management System |
| ICMS | International Conference on Modeling and Simulation |
| ICMS | Integrated Combat Management System |
| ICMS | Intellectual Capital Management System |
| ICMS | Integrated Control and Monitoring System |
| ICMS | International Conference on Mathematical Sciences (yearly conference) |
| ICMS | Information Center Management System |
| ICMS | Improved Crystal Metric System |
| ICMS | Integrated Contract Management System |
| ICMS | Instrument Calibration and Maintenance System |
| ICMS | Intelligent Chassis Management System |
| ICMS | Integrated Coaching Management System (India) |
| ICMS | Internal Communications Management System |
| ICMS | Intra-Cortical Micro-Stimulation |
| ICMS | International Company for Mobile Services (Saudi Arabia) |
| ICMS | Integrated Cardiovascular Monitoring System |
| ICMS | Internal Countermeasure System |
| ICMS | Integrated Circuit/Message Switch |
| ICMS | International Case Management System |
| ICMS | Interdepartmental Committee for Meteorological Services |
| ICMS | Intelligent Cable Management System (NORDX/CDT) |
| ICMS | Intelligent Condition Monitoring System |
| ICMS | International Center for Medical Specialties |
| ICMS | Inter Carrier Messaging Service |
| ICMS | Intelligent Contact Management Solutions (Cisco) |
| ICMS | International Crowd Management & Security Group (The Netherlands) |
| ICMS | Internal Countermeasures System |
| ICMS | Intelligence Cycle Management Subsystem (IAIPS) |
| ICMS | Information Center for Mathematical Sciences (South Korea) |
| ICMS | International Conference on Mathematics and Statistics |
| ICMS | Integrated Corridor Management System (various locations) |
| ICMS | Infinite Cohesion Management System (Gahanna, OH) |