Topic summary
Branded Unix
Extracted from the Wikipedia article Unix-like.
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Eric S. Raymond and Rob Landley have suggested that there are three kinds of Unix-like systems: "genetic UNIX", derived from the original Bell Labs UNIX, "trademark UNIX" (or "branded UNIX"), for which the Open Group have licensed the UNIX trademark, and a third category of operating systems that are not in either of those categories but that are patterned after the original Bell Labs UNIX.