MOS definitions
MOS Military Occupational Specialty (US Army)
MOS Metal-Oxide Semiconductor
MOS Microsoft Office Specialist
MOS Mean Opinion Score
MoS Ministry of Sound (London Night Club)
MOS Museum of Science (Boston, MA)
MOS Margin of Safety
MOS Manual of Style
MOS Mates of State (band)
MOS Mambo Open Source
MOS Medical Outcomes Study
MOS Moment of Silence
MOS Model Output Statistics
MOS Measure of Success (Joint Commission; Oakbrook Terrace, IL)
MOS Metal-Oxide-Silicon
MOS Made of Steel
MOS Military One Source (US DoD)
MOS Member of the Opposite Sex
MOS Medical Office Specialist
MOS Maryland Ornithological Society (Baltimore, MD)
MOS Mobile Operating System
MOS Maintenance Operations Squadron
MOS Mother of Sorrows (New York Catholic school)
MOS Multi-Object Spectrograph
MOS Marine Observation Satellite
MOS Mom over Shoulder (texting; aka Mother over Shoulder)
MOS Macintosh Operating System
MOS Media Object Server
MOS Multi-Object Spectrometer
MOS Minimum Operable Segment (rail transit construction planning; various locations)
MOS Member of the Service (NYPD Sworn Officer)
MOS Make Out Session
MOS Matter of Size
MoS Manual of Standards
MOS Monthly Operational Summary
MOS Member of Service (police)
MOS Mittelstandskinder Ohne Strom (band, German: Middle-Class Children Without Energy)
MOS Michigan Office Solutions (est. 1957)
MOS Major Orthopedic Surgery
MOS Minimum Operating Strip
MOS Mic-O-Say (Tribe)
MOS Mic-O-Say (Honor Camping Society of the Heart of America Council, Boy Scouts of America)
MOS Margin on Services (insurance)
MOS MIDS on Ship (Multifunctional Information Distribution System)
MOS Method of Statement
MOS Mode Of Shipment
MOS Mini Operating System
MOS Major Operating System
MOS Multi-Beam Optical Sensor
MOS Michael O'Neal Singers (Roswell, GA)
MOS Marineoperationsschule (German Navy school)
MOS Mother of Our Savior (Detroit, MI grade school, now defunct)
MOS Military Occupation Skill
MOS Michigan Orchid Society (Ann Arbor, MI)
MOS Method Of Supply
MOS Massachusetts Orchid Society
MOS Mobility Operations School
MOS Military Operations Specialist (FAA)
MOS My Own Science (education program)
MOS Metal Oxide Substrate
MOS Mountain Ocean Sea (Japanese burger chain)
MOS Maintenance Out of Service
MOS Manually Operated Switch (railroads)
MOS Minimum Operating Standard
MOS Maritime Observation Satellite
MOS Mute on Sound
MOS Motion Omit Sound (TV term for silent film or tape)
MOS Manned Orbital Station
MOS Minimum Operational Sensitivity
MOS Maintenance Override Switch
MOS Marked Out of Stock
MOS Management Operations Staff
MOS Marine Occupational Standard
MOS Manual Observing System
MOS Military Oceanography Subcommittee
MOS Malibu Orchid Society, Inc.
MOS Mapping Ocean Sanctuaries (Center for Image Processing in Education)
MOS Mit Out Sprechen/Sound (without speech; German/English movie term for shot without dialog)
MOS Measure Of Suitability/Stability
MOS Madonna of the Streets
MOS Minus Optical Strip (acting)
MOS Material Ordering Schedule
MOS Materials Ordering System
MOS Military Obligated Service
MOS Modulated Orthogonal Sequence
MOS Monitor Only Stations
MOS Mission Operational Specialty
MOS Main Object Size
MOS Movable Oil Saturation
MOS Morph Operating System
MOS Multifunctional Operator System
MOS Multiplex Out of Sync (Hekimian)
MOS Manually Out of Service
MOS Modine Operating System (Modine Manufacturing Co.)
MOS Modetti Office Services (Singapore)
MOS Monthly Oil and Gas Statistics (database)
MOS Man of Steel (aka The Man of Steel; also seen as TMOS)
MOS Multimedia Operating System (First Virtual Corporation)
MOS Material On Site
MOS Management Operating System
MOS Motor Operated Switch
MoS Miracle of Science (science fiction)
MOS Medical Office Software, Inc. (Fort Lauderdale, FL)
MOS Mission of Service