Microsoft Office Specialist
Metal Oxide Semiconductor
Mean Opinion Score
Marine Observation Satellite
Management Operating System
Master Operating System
Multiprogramming Operating System
Military Occupational Speciality
Ministry of Supply
Magneto-Optic Storage
Mean Opinion Scores
Metal Oxide on a Substrate
Military Operational Specialty
Machine Operating System
Maintenance Out-of-Service
Maintenance Override Switch
Mambo Open Source
Managed Objects
Manager-Operator Services
manual of standards
Manufacturing Orders
Marine Observation System
Marine Oceanographic Satellite
Material Order System
Media Object Server
Message Oriented Signaling
Metal Oxid Semiconductor
Metal Oxide Silicon
Metal-Oxide Silicon/Semiconductor
Method Of Support
Minimum Operating System
Missile on Site
Mobile Operations Supervisor
Motor Operated Switch
Multiuser Operating System
Mux Out-of-Sync