Missile Defense Agency 
Milestone Decision Authority 
minimum descent altitude 
Model Driven Architecture 
Monochrome Display Adapter 
Multiple Docking Adapter 
Maritime Domain Awareness 
Missile Defense Agency's 
Mail Delivery Agent 
Map Development Area 
Main Distribution Assembly 
Materials Dispersion Apparatus 
minimum detectable activity 
McDonnell Douglas Aerospace 
Metric Data Assembly 
Missile Defense Act 
Motorized Door Assembly 
Maintainability Design Approach 
Manufacturing Defect Analyzer 
Manufacturing Defects Analyzer 
Mechanisms Drive Assembly 
Medical Devices Agency 
Medical Digital Assistant 
Metal De-Activator 
Military Damage Assessment 
Minimum Decision Altitude 
minimum detectable amount 
Motor Drive Amplifier 
Motor Drive Assembly 
Museums Documentation Association