GPL License (GNU General Public License)

• The GNU license currently has 2 commonly used versions, GPL-2.0 and GPL-3.0.
• Latest version ( GPL-3.0 ) release date 29-06-2007 .
• Full License content: https://www.gnu.org/licenses/gpl.html
• Benefits when using software applying GPL License:
  • To copy and distribute the program, be required to pay a fee for such distribution.
  • Change the program for personal use.
  • Distribute the modified version.
• Duty:
  • When copying and distributing the program, the original copyright notices and no warranty must be attached (except in the case of additional written warranty provisions).
  • When you distribute a version that has been modified by yourself, it must be clearly noted that the version has been changed, the components are changed, and the GNU license is applied to the modified version.
  • When releasing the program, the source code of the program must be made public, and the source code of the program must be disclosed for a minimum of 3 years without charging any fee from the source code requesters except for shipping or equivalent.