Fair use definition

“The conditions under which you can use material that is copyrighted by someone else without paying royalties.”

http://dictionary.reference.com/browse/fair+use

Fair use sample

This site may contain copyrighted material encountered in the Internet, the use of which has not always been specifically authorized by the copyright owner. I am making such material available in an effort to advance understanding of [Finances, Military, Sciences, Scholarship, Spiritual, Training], etc… I believe this constitutes a “Fair Use” of any such copyrighted material as provided for in Section 107 of the US Copyright Law.

In accordance with Title 17 U.S.C. Section 107, the material on this Site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes.

For more information please visit: http://www.copyright.gov/fls/fl102.html.