Debian Is the Most Important Linux
inkscapee writes "Without Debian we are nothing. Debian is the most influential and important Linux, and is unique for being the largest, oldest, 100% non-commercial community-driven distro. '...just under 63% of all distributions now being developed come ultimately from Debian. By comparison, 50 (15%) are based on Fedora or Red Hat, 28 (9%) on Slackware, and 12 (4%) on Gentoo.'"
It's Linux, but it's not GNU/Linux, which is what the term Linux distribution generally refers to, it has nothing to with X but with the GNU toolchain. More like Dalvik/Linux...