Similar to Unix系オペレーティングシステム
 - Unix系Unix-like
 - A/UXA/UX
 - Arch HurdArch Hurd
 - AudioOSAudioOS
 - Berkeley Software DistributionBerkeley Software Distribution
 - BridgeOSBridgeOS
 - CB UNIXCB UNIX
 - Digital UNIX
- Domain/OSDomain/OS
 - GNUGNU
 - GNU HurdGNU Hurd
- HI-OSF/1-MJ
 - HI-UX
 - HP-UXHP-UX
 - IllumosIllumos
 - IOSIOS▼-2 trends
 - IOS 10IOS 10
 - IOS 11IOS 11
 - IOS 12IOS 12
 - IOS 13IOS 13
 - IOS 14IOS 14
 - IOS 15IOS 15
 - IOS 16IOS 16
 - IOS 17IOS 17
 - IOS 18IOS 18
 - IOS 26IOS 26
 - IOS 4IOS 4
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