Multiple Award Schedule 
Mission Avionics System 
Monetary Authority of Singapore 
Mass Announcement System 
Multiple Award Schedules 
Military Agency for Standardization 
Microbial Air Sampler 
MODIS Airborne Simulator 
Management Advisory Services 
Maserati 
Military Airlift Squadron 
Molecular Absorption Spectroscopy 
magic angle spinning 
magnesium aluminum silicate 
Managed Access System 
Maneuver Air Support 
marker assisted selection 
Mass calling 
Master of Archival Studies 
Mechanical Actuation System 
Memory Administration System 
Message Analysis Server 
Microbeam Analysis Society 
Military Assistance Sales 
Minimum Average Surcharge 
Mobile Application Subsystem 
Module Attache System 
Multi-administration Satellite System 
Multi-agent Systems Laboratory 
Multiple Address System