The Spirit Of Unix vs. The Unix Trademark
BSD Forums writes "This article conveys the message that Linux, BSD, and Darwin continue what Unix started. InfoWorld's Tom Yager says that several readers took him to task for referring to Linux, BSD, and OS X as Unix. He feels that Unix has a rich legacy that deserves to be preserved and accurately conveyed to new generations of computer scientists. It rattles many of us to see that the operating systems that best exemplify Unix traditions today aren't Unix at all."
Everyone should read this.
Applies to Linux/FreeBSD/OpenBSD/Darwin/Others as well as NetBSD.
There's a very detailed and interesting story, hosted in Oreilly which describes the history of UNIX.
"Twenty Years of Berkeley Unix- From AT&T-Owned to Freely Redistributable " remembers how UNIX evolved from it's early days as a proprietary software owned by AT&T; branching over to the educational field as BSD (Berkeley System Distribution), and finally ending up as various flavors of SysV and BSD's both proprietary, and freely-redistributable.
The link: here!