What is copyright?
Is not protected by copyright law, Copyright has expired, The work was created by public money, nobody owns it.
It expires, it is downloaded, or used with public money.
EX. Work produced by the government
Copyrighted work that you can use, copy, or give away for free
Distributed informally, and has no cost, and you can do what ever you want with it!
EX. Adobe Reader
All Rights Reserved
EX. © 2009 Joel Friedlander
EX. Apache HTTP Server