What does MSO stand for?

Main Signal Office - British

Maintenance Standard Order

Maintenance Support Office - Navy

Malaysian Students' Organization - Australia

Managed Service Organization - Health Insurance

Management Science Office

Management Service Organization

Management Systems Office - NASA

Management Systems Operations (ACAE)

Mandatory Second Surgical Opinion - Health insurance

Manned Solar Observatory (MCD)

Manned Spacecraft Operations - NASA (KSC)

Manufacturer's Statement of Origin

Manufacturing Sequence Outline (MCD)

Marginally Stable Orbit - Physics

Marine Safety Office (MCD)

Marine Staff Officers (EA)

Maritime Staff Office (ACAE)

Marketing Service Office (SAUS)

Marketing Services Officer - Insurance

Mars Surface Operation

Martha Stewart Living Omnimedia

Massachusetts Society of Optometrists (EARSL)

Mass Spectrometer Outgasing (KSC)

Master of Science in Orthodontics

Master of the Science of Oratory

Master Specification Officer (SAUS)

Material Sales Order

Materiel Status Office (MCD)

Mazur Surname Organization - Association (EA)

Medial Superior Olive - Brain anatomy

Medical Services Organization (MHCS)

Medical Staff Organization (HCT)

Member of the Society of Osteopaths - British

Mentally Stable and Oriented (MELL)

Mesityl Oxide - Also, MO - Organic chemistry

Methionine Sulfoxime - Biochemistry

Michigan Southern Railroad - Federal Railroad Administration identification code

Military Satellite Organization

Military Service Obligation (AFM)

Military Supply Officer (AFM)

Minesweeper, Ocean - Nonmagnetic - Navy symbol

Mini-Sport Inc., Fair Haven, MI - Manufacturer code for watercraft hull identification number (USCG)

Missabe Southern Railroad

Missile Safety Officer (AFM)

Missoula - Montana - Seismograph station code, US Geological Survey (SEIS)

Mixed Services Organisation - British Armed Services

Mixed Signal Oscilloscope - Automotive engineering

Mobile Switching Office - Bell System

Model for Spare Optimization (MCD)

Mombum - Language code (ETLW)

Morale Support Officer - Military (AABC)

Moss Resources Ltd. - Vancouver Stock Exchange symbol

Mouvement Socialiste Occitan - Occitanian Socialist Movement - France - Political party (PPE)

Mozambique Solidarity Office (EA)

Multiple System Operator - Cable television

Multiple Systems Operator

Multistage Operation (MHDI)