Copyright and the Law

1.  Copyright - an exclusive right that a person is given for doing their own original work which allows them to do anything to it (print, copy, etc) and give permission to others to do the same. This provides protection of the work so that others do not steal it and take credit for it.
2. Copy-free - the freedom to use and modify the work by anybody. The reason for this can be that copyright has ended, the owner wants others to use it, or the owner does not care about it being copyrighted.
3. Trade Mark - a symbol - which could be a letter, picture, etc. - which lets the owner's products be distinguished from others.
4. Creative Commons - an organization that collects copy free work to allow others to use it legally.
5. Royalty Free - the right to use things that are copyrighted without the need to pay its owner for using it (usually related to music).
6. GNU Licensed  - a free software created for the GNU project and its goal is to encourage free software.
7. Public Domain -a thing that is not copyrighted and is available for the public.

•  Is there a relationship between copyright and reliable information?

Copyrighted work is protected by the law and the law is supported and made by the government. Therefore, it makes it reliable.

Copyrighted = reliable
Copy free = depends