Media Access Control 
Medium Access Control 
Military Airlift Command 
Message Authentication Code 
Mandatory Access Control 
Maintenance Allocation Chart 
Mean Aerodynamic Chord 
Message Authentication Codes 
Multiple Award Contract 
Macintosh 
Media Access Controller 
Main Display Console 
Maintenance Advisory Committee 
Medicare Administrative Contractor 
Mineralogical Association of Canada 
Monitored Anesthesia Care 
Multiplexed Analog Components 
MACK TRUCKS INC. 
MacLeods 
Market Access and Compliance 
Maximum Allowable Concentration 
Mission Assurance Category 
Multiple Access Computer 
Maintenance Allocation Charts 
Major Account Center 
Major Accounts Center 
Management Advisory Committee 
Maneuver Area Command 
Master Addictions Counselor 
materials and coatings