Military Occupational Specialty 
Microsoft Office Specialist 
Metal Oxide Semiconductor 
Model Output Statistics 
Military Occupational Specialties 
Mean Opinion Score 
Marine Observation Satellite 
Member of the Opposite Sex 
Mission Operations System 
Margin of Safety 
Military Occupation Specialties 
Management Operating System 
Master Operating System 
Multiprogramming Operating System 
Ministry of Supply 
Modular Optoelectronic Scanner 
months 
Magneto-Optic Storage 
Major Operating System 
Management Operations Staff 
Manual Observing System 
manual of style 
Mean Opinion Scores 
medical outcomes study 
Metal Oxide on a Substrate 
Metal Oxide Semiconductors 
metal-oxide silicon 
Military Occupational Skill 
Military Occupational Speciality 
Military Operational Specialties