Bessemer converter - a refractory-lined furnace used to convert pig iron into steel by the Bessemer process

catalytic converter - a converter that uses a platinum-iridium catalyst to oxidize pollutants and carbon monoxide into carbon dioxide and water; an antipollution device on an automotive exhaust system

data converter - converter for changing information from one code to another

device - an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"

electrical converter - converter that converts alternating current into direct current or vice versa

electronic converter - (telecommunication) converter for converting a signal from one frequency to another

torque converter - converter for transmitting and amplifying torque (especially by hydraulic means)