| MECCA | Manitoba Excellence For Call Centre Achievement 
| Others |
| MECCA | Master Electrical Common Connector Assembly
| Others |
| MECCA | Materials Exchange Center for Community Arts
| Others |
| MECCA | Mckee Education Center For Children And Adults
| Others |
| MECCA | Memphis Educational Computer Connectivity Alliance
| Others |
| MECCA | Middle East Coast Carolina Always
| Others |
| MECCA | Middle East Cross Central Asia
| Others |
| MECCA | Middle European Colony of Contemporary Arts
| Others |
| MECCA | Mobile Empowered Collaborative Computing Architectures
| Others |
| MECCA | Model Evaluation Consortium for Climate Assessment
| Others |
| MECCA | Monongalia Emergency Centralized Communications Agency
| Others |
| MECCA | Mopar Enthusiasts Car Club of America
| Others |
| MECCA | Multimedia Entertainment Control Center Application
| Others |
| MECCA | Muslim Educational and Cultural Committee for Awareness
| Others |