Per the original funding announcement, the universities acting as Curriculum Development Centers retain the copyright for their components. However, they have chosen to distribute the materials for public use.  They have adopted a “Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported” license.  This means all users can use, share, and adapt materials but must: 1) attribute originator of work; 2) use only for non-commercial purposes; 3) share any changes made under same license.  Use of materials for educational purposes, such as in a course for which a fee is charged to the student, is allowed. The license does not permit the selling of the components directly.  More can be learned about this Creative Commons license on the NTDC website at http://www.onc-ntdc.org or http://www.onc-ntdc.info and also at http://creativecommons.org/licenses/.  Additionally, information can be found within the instructor's manual for each component.