Open Source Physics programs and source code are released Open Source code under the GNU General Public License (GPL). The GPL license requires that any program or code library that incorporates any portion of the OSP library must also be released under the terms of the GNU GPL license.  See: < http://www.gnu.org/licenses/gpl.html >.

Narrative text (such as textbooks, articles, or on-line curricular material) that uses OSP programs may, however, be copyrighted. You must contact the narrative author or publisher for permission to use these narratives.