SMK (エスエムケイ, SMK株式会社) is a company that manufactures and sells various parts for electro-communication devices and electronic equipment. It operates through three divisions: Connection System, Functional Components, and Touch Panel. The Connection System division specializes in connectors, including board-to-board, board-to-wire, RF coaxial, interface, card, battery, power, and LED connectors. The Functional Components division provides switches, such as push, slide, detector, multi-functional devices, and remote controls. The Touch Panel division offers touch panels, including resistive, optical, and capacitive touch panels.