Outside of the UT System license, use of copyrighted material is dependent on the concept of Fair Use, Section 107 of the United States Copyright Law. It presumes the use is minimal enough so that it does not interfere with the copyright holder's rights. Under the "fair use" rule of copyright law, an author may make limited use of another author's work without asking permission.
Fair use is intended to support teaching, research, and scholarship, but educational purpose alone does not make every use of a work fair.
See the Fair Use Index for additional information.
It is always important to analyze how you are going to use a particular works against the following four factors of fair use:
The Fair Use Evaluator can help you decide if you are using copyrighted material "fairly" under the U.S. Copyright Law.
The following charts can provide helpful information on deciding if you are using copyrighted material fairly:
Public domain refers to works that do not fall under copyright restrictions. Three main categories of public domain works: