#converter__convertor  a device for changing one substance or form or state into another
  supertype:  #device  an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"
  subtype:  #Bessemer_converter  a refractory-lined furnace used to convert pig iron into steel by the Bessemer process
  subtype:  #catalytic_converter__catalyticconverter  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
  subtype:  #data_converter  converter for changing information from one code to another
     subtype:  #digital-analog_converter__digital-to-analog_converter  device for converting digital signals into analogue signals
     subtype:  #digitizer__analog-digital_converter__analog-to-digital_converter  device for converting analogue signals into digital signals
  subtype:  #electrical_converter  converter that converts alternating current into direct current or vice versa
     subtype:  #inverter  an electrical converter that converts direct current into alternating current
     subtype:  #power_pack__powerpack  a device for converting a power supply to a voltage required by particular equipment
     subtype:  #synchronous_converter__synchronousconverter__rotary__rotary_converter  electrical converter consisting of a synchronous machine that converts alternating to direct current or vice versa
  subtype:  #electronic_converter  (telecommunication) converter for converting a signal from one frequency to another
  subtype:  #torque_converter  converter for transmitting and amplifying torque (especially by hydraulic means)

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