| Acronym | Definition |
|---|
| MECS | Ministry of Education, Culture and Science (Mongolia) |
| MECS | Mazda Electronic Control System |
| MECS | Multi Element Code System |
| MECS | Manufacturing Energy Consumption Survey |
| MECS | Michigan Electric Coordinated Systems |
| MECS | Model Equine Championships (UK) |
| MECS | Maximum Entropy Covariance Selection |
| MECS | Mother Earth's Concerned Students (Warren Township High School Club) |
| MECS | Modular Embedded Computer Software |
| MECS | Minimum Essential Command Suite |
| MECS | Mining Equipment Certfication Service (United Kingdom) |
| MECS | Major East Coast Storm (meteorology) |