| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 14449-14449 | Media system is a subclass of collection |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 25883-25883 | Video game player is a subclass of media system |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 26224-26224 | Multimedia projector is a subclass of media system |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 1204-1204 | Cd player is a subclass of media system |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 1269-1269 | Dvd player is a subclass of media system |
| No TPTP formula. May not be expressible in strict first order. | Media.kif 1382-1382 | Vcr system is a subclass of media system |
| No TPTP formula. May not be expressible in strict first order. | ComputingBrands.kif 817-817 | IPod is a subclass of media system |
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