Mars Global Surveyor
Mobile Gun System
Missile Guidance Set
Media Gateways
Mission Ground Station
Mobile Ground Station
Mobile Ground System
Maine Geological Survey
Malaysian Government Securities
Maryland Geological Survey
McMurdo Ground Station
Minnesota Geological Survey
missile guidance system
Aeromagar
Machine Gun System
Machine Guns
magnetic guidance system
malignancy grading system
malignant gliomas
Mammalian Genotyping Service
mammary gland secretions
Manchester Grammar School
Map Generation System
Maritime Geoscience Services
Master Gunnery Sergeant
Master of General Studies
maternal grandsire
Meckel-Gruber syndrome
memory-guided saccade
Merit Global Service
Metal Gear Solid
Metal Gear: Source
metal gravel stop
Methodist Girls' School
methylglyoxal synthase
metric gravitational system
MetroGas, S.A.
Microsoft Game Studios
Mongolian gerbils
monoglycerides