Microgravity Science Glovebox
Meteosat Second Generation
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Maintenance Steering Group
Marine Security Guard
Mechanical Subsystem Group
Microgravity Sciences Glovebox
Mission Support Group
Management Steering Group
Master Sergeant
Materiel Systems Group
Members' Services Group
Military Support Group
Modular steam generator
Flavor enhancer
machine stress-grade
Madison Square Garden
Maintenance and Service Guide
Maintenance Study Group
maintenance support group
Maintenance Support Guide
Maintenance System Guide
major surface glycoprotein
malate synthase G
Management Science Group
Manpower Scaling Guide
Manufacturers Standard Gauge
Mapper Sweep Generator
Marine Systems Group
Mars Global Surveyor
Master Sergant
Material Support Group
Maximum Stable Gain
Mcmurry Student Government
Melanesian Spearhead Group
mercury in silastic strain gauge plethysmography
Message Multi-Source Group
middle silk gland
minor salivary gland
Minor salivary glands