Fair Use of Copyrights
Section 107. Limitations on exclusive rights: Fair use
Notwithstanding the provisions of sections 106 and 106A, the fair use of a copyrighted work, including such use by reproduction in copies or phonorecords or by any other means specified by that section, for purposes such as criticism, comment, news reporting, teaching (including multiple copies for classroom use), scholarship, or research, is not an infringement of copyright.
In determining whether the use made of a work in any particular case is a fair use the factors to be considered shall include --
(1) the purpose and character of the use, including whether such use is of a
commercial nature or is for non-profit educational purposes;
The fact that a work is unpublished shall not itself bar a finding of fair use if such finding is made upon consideration of all the above factors. From COPYRIGHT LAW OF THE UNITED STATES OF AMERICA, revised February 1, 1993.