Given the number of Linux distros out there, how did we pick just 14? Some were obvious; the likes of Slackware and Debian have been around since Linus was in short trousers. SUSE, Fedora, Mandriva and Ubuntu are similarly too significant to ignore. What about the others? Start reading here
Debian is one of the original distros, dating back to 1993. The Debian package management system is generally considered superior to the RPM systems, although they have closed the gap (mainly by incorporating features from Debian’s system).