MWS

MWS may refer to:


 * Magic Workstation, a gameplay simulator for Magic: The Gathering
 * Marden–Walker syndrome, a rare autosomal recessive disorder
 * Member of the Wernerian Natural History Society, a former Scottish learned society
 * Modular weapon system, a rifle which has components that can be reconfigured to give the weapon different capabilities
 * Muckle–Wells syndrome, a rare autosomal dominant disease
 * Murakami-Wolf-Swenson, a former name of Fred Wolf Films Dublin, an animation company