A specific typeface.

(uncountable) NYSE stock ticker symbol for Mobile Telesystems OJSC

(video games) Initialism of massively multiplayer online game. / (aviation) Maximum operating Mach number; the Mach number which an aircraft should not exceed in the course of routine operation.

(medicine) A rare skin disorder, a form of ichthyosis characterized by massive hyperkeratosis with an appearance like spiny scales.