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Mo or MO may refer to:

Arts, entertainment, and media[edit]

Fictional elements[edit]

  • Mo (Oz), a fictional country in the book The Magical Monarch of Mo by L. Frank Baum
  • Mo, a girl in the Horrible Histories TV series
  • Mo, also known as Mortimer, a fictional character in the novel Inkheart by Cornelia Funke
  • Mo, a fictional character in the webcomic Jesus and Mo
  • Mo, the main character in the fictional Mo's Mischief series
  • Mo, an ophthalmosaurus from The Land Before Time franchise
  • MO (Maintenance Operator), a fictional robot character in the Filmation series Young Sentinels
  • M-O (Microbe Obliterator), a fictional robot character in film WALL-E
  • Mo the clown, a character played by Roy Rene, 20th-century Australian stage comedian
  • Mo Harris, a fictional character in the BBC soap opera EastEnders
  • Little Mo Mitchell, a fictional character in the BBC soap opera EastEnders



  • M.O. (album), a 2013 album by American hip hop artist Nelly
  • M.O, an English pop trio
  • Mo Awards, annual awards for Australian live entertainment
  • The MO, a Dutch pop band

Businesses and organizations[edit]

  • Altria Group, formerly Philip Morris (New York Stock Exchange symbol MO)
  • Calm Air (IATA airline designator MO), an airline based in Thompson, Manitoba, Canada
  • Milicja Obywatelska, a state police institution in Poland from 1944 to 1990







Science and technology[edit]


Other uses in science and technology[edit]

  • Mo (grist mill) (磨), ancient Chinese stone implements used to grind grain into flour
  • Manual override, a mechanism wherein control is taken from an automated system and given to the user
  • Metalorganics, also known as organometallics, in chemistry and materials science
  • Molecular orbital, a mathematical function describing the wave-like behavior of an electron in a molecule
  • Molybdenum (symbol Mo), a chemical element
  • Momentary open (MO), a group of electrical switches
  • Yamaha MO, a music synthesizer


  • MO-class small guard ship, a class of small ships produced before and during World War II for the Soviet Navy
  • Morris Oxford MO, an automobile produced by Morris Motors of the United Kingdom from 1948 to 1954

Other uses[edit]

  • Mo (Chinese zoology), a name that semantically changed from "giant panda", to "a mythical chimera", to "tapir"
  • Modus operandi (abbreviation m.o.), Latin meaning "mode of operation"; distinctive behavior patterns of an entity
  • Month (abbreviation mo.), a unit of time of approximately 30 days
  • Operation Mo, or the Port Moresby Operation, a Japanese plan to take the Australian Territory of New Guinea during World War II

See also[edit]