Coherent

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Coherent was a 'clean room' clone of Unix v7. It was ported to various CPU's in the 1980's and was somewhat famous for being audited by bell labs and was vetted to be free of AT&T code. Despite it's low price it failed to achieve any significant market share.

v • d • e UNIX Versions, Vendors and Related
Research Unix PDP-7 UNIX • V1 • V2 • V3 • V4 • V5 • V6 • V7 • V8 • V9 • V10 • LSX • MINI-UNIX • Unix/32V

AT&T - CB-UNIX • PWB/UNIX • USG UNIX • System III • System IV • System V

BSD - 2.9 BSD • 2.10 BSD • 2.11 BSD • 3BSD • 4BSD • 4.1 BSD • 4.2 BSD • 4.3 BSD • 4.4 BSD

BSD Descendants 386BSD • NetBSD • OpenBSD • FreeBSD • NeXTSTEP • Darwin

Other - xv6 • AMIX • SunOS • Solaris • ULTRIX • A/UX • XENIX • AIX • Dell UNIX

Clones - DEMOS • Coherent

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