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MULTICS
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UNICS
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UNIX Time-Sharing System V1
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UNIX Time-Sharing System V2
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UNIX Time-Sharing System V3
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UNIX Time-Sharing System V4
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UNIX Time-Sharing System V5
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UNIX Time-Sharing System V6
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UNIX BSD
- FreeBSD
- NetBSD
- OpenBSD
- MACOSX
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UNIX Time-Sharing System V7
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UNIX System V
- AIX
- HP-UX
- IRIX
- XENIX