Fedora
From OSLUG Wiki
Fedora is a "community" supported version of RedHat. RedHat used to produce two lines of Linux: a free version you could download off the internet or buy boxed at a store, and a version aimed at corporate customers who wanted to buy service contracts and support agreements as well as the software. RedHat has stopped producing the free version and switched their focus to the line that makes them money.
The free version has been taken over by the Fedora Project. It still remains very closely related with RedHat and is used as a testing grounds by RedHat's engineers for new features and programs that might eventually end up in their corporate versions.
Fedora has a much faster release schedule than RedHat (around 6 months instead of several years) with each release being called a Core. Thus, Fedora Core 1 was the first public release of the distro by the Fedora Project, Core 2 was the second, and so on.
