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XFree86 was itself a fork.


What's the difference between X11 and xfree86 (and I guess Xorg)?


XFree86 was an implementation of the X11 protocol. X.org is a fork of the XFree86 project (short version: XF86 license changed, and a huge chunk of the core contributors saw that as the final reason to take their work elsewhere).


XFree86 was a fork of X11R5.


I thought it was R6.




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