Micro Channel Architecture 
Maritime and Coastguard Agency 
Minimum Crossing Altitude 
Major Constituent Analyzer 
Master Control Assembly 
Medicines Control Agency 
Machine Check Architecture 
maximum calling area 
Military Construction Army 
Motor Control Assembly 
Movement Control Agency 
Mast Canister Assembly 
Maximum Crossing Altitude 
MICRONAIR 
middle cerebral artery 
Minimum Cruising Altitude 
Ministry of Civil Aviation 
Multiplexing Channel Adapter 
Main Combustion Assembly 
Manufacturing Chemist Association 
Manufacturing Chemists Association 
Master of Computer Applications 
Maternity Center Association 
maximum credible accident 
Micro Channel Adapter 
Microsoft Certified Architect 
military civic action 
Military Coordinating Activity 
Millennium Challenge Account 
Mission Complement Analysis