http://www.informatics-tech.com/linux-vs-mac-vs-windows-unbiased-comparison.html

http://wi-phye.com/blog/the-pros-and-cons-of-linux-windows-and-osx/

http://wiki.answers.com/Q/What_is_the_best_operating_system_to_use_in_desktop#slide1

http://lifehacker.com/5904069/five-best-linux-distributions