Orbital Maneuvering Subsystem - NASA (NAKS)
Output per Man Shift (AD)
Jim Omundson Boat Building, Canby, OR - Manufacturer code for watercraft hull identification number (USCG)
Margin System on OMLX (SAUS)
Object Management Services (SAUS)
Object Management System - Computer science (VLIE)
Occupational Medical Service
Ocean Minesweeper
Octahedral Molecular Sieve - Inorganic chemistry
Odle McGuire and Shook Corp. - Commercial firm
Office Mail System - Computer science (VLIE)
Office Management System - Computer science (IAA)
Office of Management Services - Department of Agriculture
Office of Management Studies (EA)
Office of Management Support - Environmental Protection Agency (EPA)
Office of Marketing Services - of BDSA
Office of Mobile Sources - Environmental Protection Agency (GFGA)
Off-Line Management System (SAUS)
Oil Market Simulation Model - Department of Energy (GFGA)
Omits - Telegraphy (PCTE)
Omsk - Former USSR - Airport symbol (OAG)
On-Board Maintenance System - Aviation
One-Minute Superstar - Actor whose bit part in a television series results in instant stardom
Opcode MIDI - Musical Instrument Digital Interface System
Open Mail System - Raindrop Software Co.
Open Management System - Vitalink Communicatons Corp.
Open Measurement Solution
Open Music System (SAUS)
Operational Maintenance System
Operational Meteorological Satellite - NASA
Operational Mission Summary - Army
Operational Mode Summary
Operational Monitoring System (MCD)
Operation and Maintenance Subsystem (SAUS)
Operations Management System (SSD)
Opocode MIDI System (SAUS)
Oppenheimer Multi-Sector Income Trust - NYSE symbol (SPSG)
Opportunity Management System (GART)
Opsocionus-Myocionus Support Network, Inc. (NRGU)
Opsocionus-Myoclonus Syndrome - Medicine (MELL)
Optical MASER - Microwave Amplification by Stimulated Emission of Radiation System
Optical Mass Spectroscopy (AAEL)
Optical Modulation System
Optimum Mode Selector (CAAL)
Options Margining System (EXCG)
Optoelectronic Measuring System (SAUS)
Optronic Mast Sensor (SAUS)
Oral and Maxillofacial Surgery
Oral Morphine Sulfate - Medicine (MELL)
Orbital Maneuvering System - or Subsystem - NASA
Orbital Mapping System (SAUS)
Orbital Multifunction Satellite
Orbit Mode Software (ACAE)
Order Management System - Computer science (GART)
Ordnance Machine Shop
Ordnance Management System (SAUS)
Ordnance Mounting System (SAUS)
Organic Mass Spectroscope (SAUS)
Organic Mass Spectroscopy
Organic Mental Syndrome - Medicine (DMAA)
Organisation Mondiale de la Sante - World Health Organization - WHO - Switzerland
Organizacion Mundial de la Salud - World Health Organization - Spanish - United Nations (DUND)
Organizational Maintenance Shop - Army
Organizational Maintenance Squadron - Air Force (MCD)
Organizational Maintenance Support
Oriental Missionary Society - Later, OMS International (EA)
Oscillation Monitoring System - Indian Railway (TIR)
Other Members Score (SAUS)
Otomandibular Syndrome - Medicine (DMAA)
Outcomes Management System (AMHC)
Outdoor Microphone System
Output Multiplex Synchronizer
Output per Man Shift
Overnight Message Service - Diversified Data Processing and Consulting, Inc. - Oak Park, MI - Telecommunications (TSSD)
Overseas Mission Society - Defunct (EA)
Ovonic Memory Switch (PDAA)
Spectravac Power Conversion Systems, Inc., Mississauga, Ontario - Library symbol - National Library of Canada (NLC)
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