| (subclass DataDisplayDevice CommunicationDevice) | Media.kif 850-850 | Data display device is a subclass of communication device |
| (subclass ComputerTerminal DataDisplayDevice) | QoSontology.kif 494-494 | Computer terminal is a subclass of data display device |
| (subclass Sign DataDisplayDevice) | Media.kif 851-851 | Sign is a subclass of data display device |
| (subclass HardcopyDocument DataDisplayDevice) | Media.kif 1031-1031 | Hardcopy document is a subclass of data display device |
| (subclass PrintedSheet DataDisplayDevice) | Media.kif 1066-1066 | Printed sheet is a subclass of data display device |
| (subclass Blackboard DataDisplayDevice) | Media.kif 1085-1085 | Blackboard is a subclass of data display device |
| (subclass ComputerDisplay DataDisplayDevice) | ComputerInput.kif 139-139 | Computer display is a subclass of data display device |
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