DMCS may refer to:
DEC Multinational Character Set, a character set by Digital Equipment Corporation Des Moines Christian School, a Christian centered private school in the Des Moines, Iowa area Dumai-Melaka Cable System (cable system) a submarine telecommunications cable system Chlorodimethylsilane Deluxe Music Construction Set, software by Electronic Arts Derecho-producing mesoscale convective system, a type of severe weather complex that produces a derecho