Task: Text Simplification
Input (English): Other key components of a typical Linux distribution are also mainly licensed under the GPL , but they may use other licenses ; many libraries use the GNU Lesser General Public License ( LGPL ) , a more permissive variant of the GPL , and the X.Org implementation of the X Window System uses the MIT License .
Output (English): Other key components of a Linux system may use other licenses ; many libraries use the GNU Lesser General Public License ( LGPL ) , a type of the GPL that is less restricted , and the X Window System uses the MIT License .