ROCK Linux is a distribution build kit, a group of tools to build GNU/Linux distributions from source. It comes with a set of predefined distributions like the Crystal ROCK desktop target or the small, bootable bootdisk target, and allows users to easily customize the build process and create new targets.
The distributions that ROCK Linux generates are sometimes called ROCK Linux themselves, although the term ROCK Linux based distribution is more appropriate.
These details are provided for information only. No information here is legal advice and should not be used as such.