#modem  (from a combination of MOdulate and DEModulate) electronic equipment consisting of a device used to connect computers by a telephone line
  supertype:  electronic_equipment  equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor)
  subtype:  acoustic_modem  a modem that converts electrical signals to telephone tones and back again

No statement uses or specializes modem; click here to add one.