| No TPTP formula. May not be expressible in strict first order. | Media.kif 702-702 | Digital data storage device is a subclass of electronic data storage device |
| No TPTP formula. May not be expressible in strict first order. | QoSontology.kif 77-77 | Hard disk drive is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 711-711 | Write once data storage is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 739-739 | Rewritable data storage is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 766-766 | Read only memory data storage is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 1128-1128 | Optical disc is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 1153-1153 | Compact disc is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 1254-1254 | DVD is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 1321-1321 | Digital audio tape cassette is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 648-648 | Internal digital data storage device is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 652-652 | Removable digital data storage device is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 657-657 | Computer disk is a subclass of digital data storage device |
| No TPTP formula. May not be expressible in strict first order. | ComputerInput.kif 789-789 | Solid state data storage device is a subclass of digital data storage device |
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