MSO

MSO is an abbreviation that may stand for:

Chemistry

• Methionine sulfoximine, a chemical compound that inhibits glutamine synthetase irreversibly

Orchestras

• Madison Symphony Orchestra, of Madison, Wisconsin, USA
• Melbourne Symphony Orchestra, of Melbourne, Victoria, Australia
• Milwaukee Symphony Orchestra, of Milwaukee, Wisconsin, USA
• Montreal Symphony Orchestra, of Montreal, Quebec, Canada

Companies and organizations

• Martha Stewart Living Omnimedia, a merchandising company founded by Martha Stewart
• Management Services Officer, the departmental head of administrative staff within the Academic Administration of a US university
• Management Services Organization, a term for a legal entity that provides management and administrative services to other organizations
• Michigan Southern Railroad (1989), a wholly owned subsidiary of Pioneer Railcorp
• Mind Sports Organization, a vehicle for promoting mental-skill games
• Muslim Students Organisation of India, a students and youth wing of Sunni Muslims.
• Mixed Service Organisation, displaced persons employed by the British Army on the Rhine in various positions up until the end of the Cold War

Telecommunications

• Multiple system operator, a class of cable television service provider

Other uses

• A file format used by the Microsoft Outlook e-mail application
• Maritime Security Operations, a method of policing various illegal activities at sea
• Manufacturer Statement of Origin, a document of ownership, usually related to a motor vehicle
• Mind Sports Olympiad, a multi-discipline international tournament for mind sports
• Missoula International Airport, public airport located in Montana, USA (IATA code: MSO)
• Mountain Skies Observatory, an astronomical observatory Wyoming, USA
• Murashige and Skoog medium, a plant growth medium used in laboratories for cellular cultivation
• United States Navy hull code for "ocean minesweeper," a type of Minesweeper (ship)
• Moston railway station, a railway station in Greater Manchester, England (National Rail code: MSO)
• Mixed-signal oscilloscope
• Mars Science Orbiter, a proposed spacraft to be sent to Mars
• Monadic second-order logic, a higher-order logic