| MAC | Maximum Aerobic Capacity 
| Others |
| MAC | Maximum Allowable Charge
| Others |
| MAC | Maximum Allowable Concentration
| Others |
| MAC | Maximum Concentration of Organics
| Others |
| MAC | McKinney Avenue Contemporary
| Others |
| MAC | Mean Aerodynamic Chord
| Others |
| MAC | Measured Attenuation Correction
| Others |
| MAC | Media Access Control
| Others |
| MAC | Media Access Controller
| Others |
| MAC | Media Action Committee
| Others |
| MAC | Medical Advisory Committee
| Others |
| MAC | Medicare Administrative
| Others |
| MAC | Medicare Administrative Contractor
| Others |
| MAC | Medicare Appeals Council
| Others |
| MAC | Medication Access Computer
| Others |
| MAC | Medium Access Control
| Others |
| MAC | Medium Access Controller
| Others |
| MAC | Membership Advisory Committee
| Others |
| MAC | Membrane Attack Complex
| Others |
| MAC | Memory Access Control
| Others |
| MAC | Men Against Communism
| Others |
| MAC | Menasha Action Council
| Others |
| MAC | Mental Adjustment to Cancer scale
| Others |
| MAC | Message Authentication Code
| Others |
| MAC | Metal Alloy Colleague
| Others |
| MAC | Metered Automatic Cartridge
| Others |
| MAC | MEVA Automatic Climbing
| Others |
| MAC | Mexican American Council
| Others |
| MAC | Michigan Agricultural College
| Others |
| MAC | Microsoft Approved Course
| Others |
| MAC | Mid America Conference
| Others |
| MAC | Mid American Conference
| Others |
| MAC | Mid Atlantic Crossing
| Others |
| MAC | Mid-American Conference
| Others |
| MAC | Mid-Atlantic Cape
| Others |
| MAC | Mid-Atlantic Cyclone
| Others |
| MAC | Midair Attitude Correction
| Others |
| MAC | Middle Aged Cops
| Others |
| MAC | Middle Aged Crazy
| Others |
| MAC | Middle Area Conference
| Others |
| MAC | Middle Atlantic Conference
| Others |
| MAC | Midland Automobile Club
| Others |
| MAC | Midwest Athletic Conference
| Others |
| MAC | Migration Advisory Committee
| Others |
| MAC | Milano Autoclassica
| Others |
| MAC | Military Advisory Council
| Others |
| MAC | Military Airlift Command
| Others |
| MAC | Military Airlift Command (Now Air Mobility Command)
| Others |
| MAC | Military Armament Company
| Others |
| MAC | Military Armament Corporation
| Others |