| MACC | Millennium Advanced Cosmetic Center 
| Others |
| MACC | Minnesota Adolescent Community Cohort
| Others |
| MACC | Minnesota Alliance of Connected Communities
| Others |
| MACC | Mississauga Airport Corporate Centre
| Others |
| MACC | Mississippian Art and Ceremonial Complex
| Others |
| MACC | Mizel Arts and Culture Center
| Others |
| MACC | Moberly Area Community College
| Others |
| MACC | Mobile Armored Computerized Combatant
| Others |
| MACC | Morale, Action, Communication, and Coordination
| Others |
| MACC | Morristown Alliance for Culture and Commerce
| Others |
| MACC | Mountain Academic Competition Conference
| Others |
| MACC | Mountain Arts Community Center
| Others |
| MACC | Movement Against Corruption and Complicity
| Others |
| MACC | Multi Age Cluster Class
| Others |
| MACC | Multi Agency Communications Center
| Others |
| MACC | Multi Agency Craft Conference
| Others |
| MACC | Multi Angle Central Column
| Others |
| MACC | Multidisciplinary Adult Cranioplasty Center
| Others |
| MACC | Multiethnic Advocates for Cultural Competence
| Others |
| MACC | Multiple Access Conservation Coalition
| Others |
| MACC | Multiple Award Construction Contract
| Others |
| MACC | Musicians Against Childhood Cancer
| Others |
| MACCA | Manasota Air Conditioning Contractors Association
| Others |
| MACCA | Markham African Caribbean Canadian Association
| Others |
| MACCA | Middle Atlantic Career Counseling Association
| Others |
| MACCA | Mine Action Coordination Centre of Afghanistan
| Others |
| MACCA | Muslim Associations for Climate Change Action
| Others |
| Maccas | McDonalds
| Others |
| MACCAS | Michigan AFRL Collaborative Center in Aeronautical Sciences
| Others |
| MACCC | Marina Alta Classic Car Club
| Others |
| MACCE | Maine Association of Chamber of Commerce Executives
| Others |
| MACCE | Major Adverse Cardiac and Cerebral Event
| Others |
| MACCE | Major Adverse Cardiac and Cerebrovascular event
| Others |
| MACCE | Major adverse cardiac and cerebrovascular events
| Others |
| MACCE | Major Adverse Cardiovascular and Cerebrovascular Event
| Others |
| MACCE | Maryland Association of Chamber of Commerce Executives
| Others |
| MACCE | Massachusetts Association of Chamber of Commerce Executives
| Others |
| MACCE | Massachusetts Association of Chambers of Commerce Executives
| Others |
| MACCE | Member of Australian Council for Computers in Education
| Others |
| MACCE | Metro Alliance Customized and
| Others |
| MACCE | Metro Alliance Customized and Continuing Education
| Others |
| MACCE | Missouri Advisory Council of Certification for Educators
| Others |
| MACCS | Magnetometer Array for Cusp and Cleft Studies
| Others |
| MACCS | Marine Air Command and Control System
| Others |
| MACCS | Marine Air Command Control System
| Others |
| MACCS | Media Arts Collaborative Charter School
| Others |
| MACCS | MELCOR Accident Consequence Code System
| Others |
| MACCS | MELCOR Accident Consequence Code Systems
| Others |
| MACCS | Mid Atlantic Capital Cardiology Symposium
| Others |
| MACCS | Mobile Access to Converged Communications System
| Others |