| (subclass OperatingSystem SoftwareSystem) | QoSontology.kif 994-994 | |
| (subclass Solaris OperatingSystem) | QoSontology.kif 1008-1008 | |
| (subclass BerkeleySoftwareDistribution OperatingSystem) | QoSontology.kif 2159-2159 | |
| (subclass MacOS OperatingSystem) | Media.kif 1542-1542 | |
| (subclass MicrosoftWindows OperatingSystem) | Media.kif 1547-1547 | |
| (subclass SymbianOS OperatingSystem) | Media.kif 1552-1552 | |
| (subclass WindowsOS OperatingSystem) | ComputingBrands.kif 60-60 | |
| (subclass PhoneOS OperatingSystem) | ComputingBrands.kif 90-90 | |
| (subclass AppleMacOS OperatingSystem) | ComputingBrands.kif 209-209 |
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