How Mac OS X Works

Lots More Information

Pure Darwin (Aug. 9, 2011) http://www.puredarwin.org/developers/xnu
Singh, Armit. "What is Mac OS X?" OS X Books. December 2003. (Aug. 4, 2011) http://osxbook.com/book/bonus/ancient/whatismacosx/arch_xnu.html
Kibsgaard, Bjornar. "History of Mac OS X." 2011. (Aug. 4, 2011) http://www.all-about-apple.com/history-of-mac-os.html
CERN. "Tim Berners-Lee's original World Wide Web browser." 2008. (Aug. 4, 2011) http://info.cern.ch/NextBrowser.html
Computer Hope. "Apple OS History." (Aug. 5, 2011) http://www.computerhope.com/history/macos.htm
Apple. "Mac 101." 2011. (Aug. 4, 2011) http://www.apple.com/support/mac101/work/
Apple. "OS X Lion." 2011. (Aug. 4, 2011) http://www.apple.com/macosx/
Apple. "Mac OS: How to release and renew a DHCP lease." Feb. 15, 2011. (Aug. 11, 2011) http://support.apple.com/kb/TS1920