| MAC | Military Armistice Commission 
| Others |
| MAC | Military Assistance Command
| Others |
| MAC | Mill Auto Conversions
| Others |
| MAC | Millmerran Auto Club
| Others |
| MAC | Minimum Alveolar Concentration
| Others |
| MAC | Minimum Antibiotic Concentration
| Others |
| MAC | Ministerial Advisory Committee
| Others |
| MAC | Ministries Agencies and Commissions
| Others |
| MAC | Minnesota Autosports Club
| Others |
| MAC | Minority Achievement Committee
| Others |
| MAC | Minority Affairs Committee
| Others |
| MAC | Mission Assurance Category
| Others |
| MAC | Missions Across Canada
| Others |
| MAC | Missions Adventure Camp
| Others |
| MAC | Mississippi Access to Care
| Others |
| MAC | Missoula Aquatic Club
| Others |
| MAC | Mitral Annular Calcification
| Others |
| MAC | Mitsubishi Adventure Club
| Others |
| MAC | Mobile Air Conditioning
| Others |
| MAC | Mobile Analytical Chemical
| Others |
| MAC | Mobis Automotive Czech
| Others |
| MAC | Model A Club
| Others |
| MAC | Money Access Center
| Others |
| MAC | Mongolian Auto Club
| Others |
| MAC | Monitored Anaesthesia Care
| Others |
| MAC | Monitored Anesthesia Care
| Others |
| MAC | Montreal Audi Club
| Others |
| MAC | Morning and Afternoon Care
| Others |
| MAC | Moron-Accessible Computer
| Others |
| MAC | Mortuary Affairs Center
| Others |
| MAC | Most Amazing Computer
| Others |
| MAC | Most Awesome Computer
| Others |
| MAC | Motor Cu Aprindere Prin Compresie
| Others |
| MAC | Motorist Assistance Center
| Others |
| MAC | Motorola Advanced Computer
| Others |
| MAC | Mouse Activated Computer
| Others |
| MAC | Move, Add, or Change
| Others |
| MAC | Moves Adds and Changes
| Others |
| MAC | Moves, Adds, and Changes
| Others |
| MAC | Mr Andy Carpenter
| Others |
| MAC | Mr. Andy Carpenter
| Others |
| MAC | Mtime, Atime, Ctime
| Others |
| MAC | Multi Access Computer
| Others |
| MAC | Multi Activity Car
| Others |
| MAC | Multi Actors Cooperation
| Others |
| MAC | Multi Agency Complex
| Others |
| MAC | Multi-Access Computer
| Others |
| MAC | Multi-Action Conditioner
| Others |
| MAC | Multi-Agency Centre
| Intelligence Agency |
| MAC | Multifunctional Automobile Communication System
| Others |