GNU General Public License (GPL) Spirit

* The GPL authority is a freeware instance, which can be owned by anyone;
* The development of GPL entities (or business enterprises) can be used by the services of such entities to obtain the license of services;
* The Source of the GPL permission should be published because the source is open source;
* Anyone can modify the authorized images of GPL to meet their own needs;
* After modification, open source should be returned to the Linux community.

(The biggest advantage of PS. Open source is that multiple users are connected quickly. debugs is fast, and the program is secure. However, the lack of access is due to the lack of "trusted person !)