Overview of the BSDs
zeekiorage writes "A good informative article about the various BSD OSs, their legacy, philosophy and importance on the ExtremeTech web site. Excerpt from the article: 'Nowadays, the term 'The BSDs' refers to the family of operating systems which were derived, to a greater or lesser extent, from BSD. The five best known BSDs are FreeBSD, NetBSD, OpenBSD, BSD/OS, and Darwin (which serves as the foundation for Apple's MacOS X). But virtually all modern operating systems -- from Windows to BeOS to Linux -- rely on crucial BSD code to run.'"
The GPL is a source of contention.
MS doesn't have a problem with the BSD license, because it allows for incorporation into proprietary applications, like the TCPIP code in Windows.