MMO may refer to:

Entertainment

Massively multiplayer online game A massively multiplayer online game (MMOG or more commonly MMO) is an online video game with a large number of players to interact in the same online game world. MMOs usually feature a huge, persistent world, persistent open world, although t ...

, a video game that can be played by many people simultaneously *

Music Minus One Music Minus One (MMO) was an American educational music company founded in Westchester, New York. The company released play-along albums intended to accompany a melodic instrument (or voice type, vocalist) as an aid for practicing. Background Mus ...

, a record company in Westchester, New York

Science and technology

Methane monooxygenase Methane monooxygenase (MMO) is an enzyme capable of oxidizing the C-H bond in methane as well as other alkanes. Methane monooxygenase belongs to the class of oxidoreductase enzymes (). There are two forms of MMO: the well-studied soluble form (s ...

, an enzyme * Maximum operating Mach number * Mercury Magnetospheric Orbiter, a component of the Mercury mapper BepiColombo * Mini-Mag Orion, a proposed type of spacecraft propulsion *

Mixed metal oxide Mixed metal oxide (MMO) electrodes, also called Dimensionally Stable Anodes (DSA), are devices with high conductivity and corrosion resistance for use as anodes in electrolysis. They are made by coating a substrate, such as pure titanium plate or ...

, a class of materials often used in electrodes

Other

* Means, motive, and opportunity, the "indicators of suspicion" * Minimum municipal obligation, minimum contribution to a pension plan *

Maio Airport The Maio Airport ( Portuguese ''Aeródromo do Maio'') is an airport in Cape Verde located in the island of Maio, about 3 km north of the island capital Porto Inglês. Its runway measures by wide.Melton Mowbray railway station, England (National Rail station code MMO) *

Marine Management Organisation The Marine Management Organisation (MMO) is an executive non-departmental public body in the United Kingdom established under the Marine and Coastal Access Act 2009, with responsibility for English waters. The MMO exists to make a significant cont ...

, UK government body *

Marine mammal observer A marine mammal observer (MMO) is a professional in environmental consulting who specializes in whales and dolphins. In recent years there has been increased concern for the effect of man-made noise pollution in the ocean, particularly upon ceta ...

, a professional in environmental consulting

Entertainment

Science and technology

Other

See also