(subclass ElectricSpeakerDevice SpeakerDevice) | ComputerInput.kif 484-484 | Electric speaker device is a subclass of speaker |
(subclass ElectricSpeakerDevice ElectricDevice) | ComputerInput.kif 485-485 | Electric speaker device is a subclass of electric device |
(subclass Loudspeaker ElectricSpeakerDevice) | ComputerInput.kif 496-496 | Loudspeaker is a subclass of electric speaker device |
(subclass Earphone ElectricSpeakerDevice) | ComputerInput.kif 502-502 | Earphone is a subclass of electric speaker device |