Mo or MO may refer to:

Arts and entertainment

Fictional characters

  • Mo, a girl in the Horrible Histories TV series
  • Mo, also known as Mortimer, in the novel Inkheart by Cornelia Funke
  • Mo, in the webcomic Jesus and Mo
  • Mo, the main character in the Mo's Mischief children's book series
  • Mo, an ophthalmosaurus from The Land Before Time franchise
  • MO (Maintenance Operator), a robot in the Filmation series Young Sentinels
  • Mo, a main character in Zoey's Extraordinary Playlist
  • M-O (Microbe Obliterator), a robot in the film WALL-E
  • Mo the clown, a character played by Roy Rene, 20th-century Australian stage comedian
  • Mo Effanga, in the BBC medical drama series Holby City
  • Mo Harris, in the BBC soap opera EastEnders
  • Little Mo Mitchell, in the BBC soap opera EastEnders

Films

  • "Mo" (魔 demon), original title of The Boxer's Omen, a 1983 Hong Kong film
  • Mo (2010 film), a television movie about British politician Mo Mowlam
  • Mo (2016 film), a Tamil horror film

Music

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

Other arts and entertainment

  • Mo (Oz), a fictional country in the book The Magical Monarch of Mo by L. Frank Baum
  • Mo (TV series), a 2022 comedy-drama

Businesses and organizations

  • 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

Language

  • Mo (kana), Romanisation of the Japanese kana も and モ
  • Mo language (disambiguation)
  • Deg language (Ghana)
  • Wakde language (New Guinea)
  • Moldavian language (deprecated ISO 639-1 language code "mo")

People

  • Mo (given name)
  • Emperor Mo (disambiguation), the posthumous name of various Chinese emperors
  • Mo (Chinese surname)
  • Mo (Korean surname)
  • MØ, Danish singer songwriter Karen Marie Ørsted (born 1988)
  • Mr. Mo (rapper), rapper, member of the group Jim Crow
  • Mr. Mo (singer), member of the Danish band Kaliber
  • Mo Twister, Filipino radio DJ and TV host Mohan Gumatay (born 1977)
  • Mo Hayder, a pen name of British crime novelist Beatrice Clare Dunkel (1962–2021)
  • Mo (wrestler), ring name of Robert Horne (1964–2025), professional wrestler
  • Mariano Rivera, Panamaian-American retired baseball player (born 1969), nicknamed "Mo"

Places

Norway

  • Mo i Rana, a town in Rana municipality, Nordland county
  • Mo, Agder, a village in Vegårshei municipality, Agder county
  • Mo, Innlandet, a village in Nord-Odal municipality, Innlandet county
  • Mo, Møre og Romsdal, a village in Surnadal municipality, Møre og Romsdal county
  • Mo, Telemark, a former municipality in the old Telemark county
  • Mo, Vestland, a village in Modalen municipality, Vestland county
  • Mo Church (disambiguation), a list of several churches by this name in Norway

Elsewhere

  • County Mayo, Ireland (vehicle plate code MO)
  • Macau (ISO 3166-1 alpha-2 country code MO)
  • Missouri, US state (postal abbreviation MO)
  • Moscow Oblast, Russia
  • Province of Modena, Italy (vehicle plate code MO)

Religion

  • Mo (divination), a traditional Tibetan Buddhist technique of divination
  • Mo (religion), an animist religion of the Zhuang people of China
  • Modern Orthodox Judaism, a movement that attempts to synthesize Orthodox Jewish values with the secular world

Science and technology

Computing

  • .mo, country code top level domain of Macau
  • Magneto-optical drive (magneto-optical storage), a data storage medium
  • Microsoft Office, an office software suite
  • Mode of operation, in encryption block ciphers
  • Motivating operation, a term describing the effectiveness of consequences in operant conditioning

Other uses in science and technology

  • Mo (grist mill) (磨), ancient Chinese stone implements used to grind grain into flour
  • Magnus and Oberhettinger aka "Formulas and Theorems for the Functions of Mathematical Physics", a mathematics book on special functions
  • 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
  • Thom spectrum MO, in topology

Vehicles

  • 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

  • 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
  • Medical officer (disambiguation)
  • The Australian English diminutive word for moustache
  • Tokyo Monorail, line prefix MO

See also

  • M0 (disambiguation)
  • Meaux (disambiguation)
  • mho, in physics, the reciprocal of the "ohm" unit of resistance
  • Mø (disambiguation)
  • Mobile (disambiguation)
  • Moe (disambiguation)
  • Moe's (disambiguation)
  • Mohs (disambiguation)
  • Mow (disambiguation)