| MACOSA | Model A Club of South Africa 
| Others |
| MACP | Manhole Assessment and Certification Program
| Others |
| MACP | Manhole Assessment Certification Program
| Others |
| MACP | Manipulation Association of Chartered Physiotherapists
| Others |
| MACP | Margaret A Cargill Philanthropies
| Others |
| MACP | Marine Aviation Campaign Plan
| Others |
| MACP | Massachusetts Alliance for Chiropractic Philosophy
| Others |
| MACP | Massachusetts Association of Consulting Planners
| Others |
| MACP | Master of Arts in Christian Practice
| Others |
| MACP | Master of Arts in Counseling Psychology
| Others |
| MACP | Master, American College of Physicians
| Others |
| MACP | Maximum Allowable Casing Pressure
| Others |
| MACP | Meningococcal A + C Polysaccharide vaccine
| Others |
| MACP | meningococcal A C polysaccharide
| Others |
| MACP | Michigan Arthritis Collaborative Partnership
| Others |
| MACP | Michigan Assigned Claims Plan
| Others |
| MACP | Michigan Association of Chamber Professionals
| Others |
| MACP | Michigan Association of Chiefs of Police
| Others |
| MACP | Microsoft Advertising Certified Professional
| Others |
| MACP | Mid America Conference on Preaching
| Others |
| MACP | Military aid to the civil power
| Others |
| MACP | Mincra Arreta Che Palone
| Others |
| MACP | Mobile Associate Communication Platform
| Others |
| MACP | Modern Army Combatives Program
| Others |
| MACP | Modified Assured Career Progression
| Others |
| MACP | Moroccan American Center for Policy
| Others |
| MACP | Mortuary Affairs Collection Point
| Others |
| MACP | Mountain Areas Conservancy Project
| Others |
| MACP | Musculoskeletal Association of Chartered Physiotherapists
| Others |
| MACP | Music Authors Copyright Protection
| Others |
| MACP | Music Authors' Copyright Protection
| Others |
| MACPAC | Medicaid and CHIP Payment and Access Commission
| Others |
| MACPAC | Mountain Area Citizens Political Action Committee
| Others |
| MACPMA | Malaysian Automotive Component Parts Manufacturers Association
| Others |
| MACPS | Manufacturers Alliance for Child Passenger Safety
| Others |
| MACPS | Margaret A Cargill Philanthropic Services
| Others |
| MACPS | Mid Atlantic Carnivorous Plant Society
| Others |
| MACPS | Modelling and Analysis of Cyber Physical Systems
| Others |
| MACPS | Modified Assured Career Progression Scheme
| Others |
| MACR | Maryland Alliance of Canine Rescues
| Others |
| MACR | Massachusetts Alliance of College Republicans
| Others |
| MACR | Master of the American College of Rheumatology
| Others |
| MACR | Mean Allowed Cell Rate
| Others |
| MACR | Missing Air Crew Report
| Others |
| MACR | Missing Air Crew Reports
| Others |
| MACR | Modified Accelerated Cost Recovery
| Others |
| MACRA | Medicare Access and CHIP Reauthorization Act
| Others |
| MACRA | Medicare Access CHIP Reauthorization Act
| Others |
| MACRA | Michigan Association of Civil Rights Activists
| Others |
| MACRA | Mid Atlantic College Reading Association
| Others |