Z:gnu-www-ja-nonsoftware-copyleft--ab7263-The idea of =3Ca href=3D"/copyleft/en

The idea of copyleft originated with &uuml;ber-hacker  Richard Stallman in 1983 when he started the GNU Project. In brief, his goal was &ldquo;to develop a complete free Unix-like operating system.&rdquo; As part of that goal, he invented and wrote the GNU General Public License, a legal construct that included a copyright notice but added to it (or, technically, removed certain restrictions), so its terms allowed for the freedoms of reuse, modification and reproduction of a work or its derivatives to be kept for all.