GNU variants (also called GNU distributions or distros for short[vague]) are operating systems based upon the GNU operating system[1][2][3][4][5] (the Hurd kernel, the GNU C library, system libraries and application software like GNU coreutils, bash, the Guix package manager, etc). According to the GNU project and others, these also include most operating systems using the Linux kernel and a few others using BSD-based kernels.[6][7][2]
GNU users usually obtain their operating system by downloading GNU distributions, which are available for a wide variety of systems ranging from embedded devices (for example, LibreCMC) and personal computers (for example, Debian GNU/Hurd) to powerful supercomputers (for example, Rocks Cluster Distribution).
Variants of the GNU operating system, which use the kernel Linux, are now widely used; though these systems are often referred to as "Linux", they are more accurately called "GNU/Linux systems".