Marszałkowska Dzielnica Mieszkaniowa, a neighbourhood in Warsaw with socialist realism architecture

MDM also refers to the Mississippi Drum Machine, a wooden percussion music instrument (as played by Seasick Steve).

modular digital multitrack recording, like ADAT

Melodic death metal, a music genre

Mechanically Deboned Meat

MDM-1 Fox, Edward Margański, Dunowska, Jerzy Makula

MDM Observatory, an optical astronomical observatory on Kitt Peak, adjacent to the Kitt Peak National Observatory

MDM Bank

Mere Dead Men, a British punk band

multiplexer-demultiplexer

"Market-dominant minority," a term coined by Amy Chua in her book World on Fire