In copy right, we copied source codes illegally or not, which is only thing.We can refer to source codes which someone produced.For sale we used someones's source code which is open and created the part of codes ourselves.We saled software…

The Foundations of the GPL Nobody should be restricted by the software they use. There are four freedoms that every user should have: the freedom to use the software for any purpose, the freedom to change the software to suit your needs, t…

GNUの抜粋 http://www.gnu.org/licenses/licenses.en.html Proprietary software developers use copyright to take away the users' freedom; we use copyright to guarantee their freedom. That's why we reverse the name, changing “copyright” into “c…