DMX512-A, a lighting communications protocol

DMX (rapper), Earl Simmons, a hip hop artist and actor

Symmetrix DMX, a series of enterprise storage arrays by EMC Corporation

DMX drum machine, manufactured by Oberheim

Davy DMX, David Reeves, a pioneer of hip hop music

DMX Krew, Ed Upton, an electronic music artist

Data Mining Extensions, a query language for data mining models

5-Dehydro-m-xylylene, the first organic molecule known to violate Hund's rule

DMX (music), a retail environment company

Distributed Multihead X Project, a X Window server that acts as a proxy to other distant X servers