Linux, as you already know, is only a kernel. The expressions, “Linux distribution” and “Linux system” are, thus, incorrect: they are, in reality, distributions or systems <emphasis>based on</emphasis> Linux. These expressions fail to mention the software that always completes this kernel, among which are the programs developed by the GNU Project. Dr. Richard Stallman, founder of this project, insists that the expression “GNU/Linux” be systematically used, in order to better recognize the important contributions made by the GNU Project and the principles of freedom upon which they are founded.