| MACM | Malta Association of Credit Management 
| Others |
| MACM | Master of Arts in Christian Ministry
| Others |
| MACM | Master-at-arms Master Chief Petty Officer
| Others |
| MACM | Medical Assurance Company of Mississippi
| Others |
| MACM | Michigan Association of Court Mediators
| Others |
| MACM | Minnesota Association for Court Management
| Others |
| MACM | Missile Application Condensed Message
| Others |
| MACM | Multi Account Copier for Managers
| Others |
| MACM | Municipal Authority of the City of McKeesport
| Others |
| MACM | Music Auditorium College of Music
| Others |