MMO

Video games Abbreviation, Initialism Initialism of massively multiplayer online game.

Aeronautics, Aerospace, Aviation, Business, Engineering, Natural sciences, Physical sciences Maximum operating Mach number; the Mach number which an aircraft should not exceed in the course of routine operation.

Biochemistry, Biology, Chemistry, Microbiology, Natural sciences, Physical sciences Abbreviation, Initialism Initialism of methane monooxygenase, see Methane monooxygenase.