↑ 가나UG, Awesome Developers. “Source Code & GPL Open Source”. 《www.snom.com》 (영어). 2018년 4월 9일에 원본 문서에서 보존된 문서. 2018년 4월 8일에 확인함. 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".