Public Domain refers to materials that are not protected by intellectual property laws such as copyright, trademark, or patent laws. The public owns these works, not an individual author or artist. Anyone can use a public domain work without obtaining permission, but no one can ever own it." Stim (2000). Most works of the Federal government are automatically in the Public Domain. (Stim, R. (2000) Getting Permission: How to License and Clear Copyrighted Materials Online & Off.)
Public Domain Review
The Public Domain Review, founded in 2011, is an online journal and not-for-profit project dedicated to promoting and celebrating the public domain in all its richness and variety.
'The Free Software Foundation is working to secure freedom for computer users by promoting the development and use of free (as in freedom) software and documentation—particularly the GNU operating system—and by campaigning against threats to computer user freedom like Digital Restrictions Management (DRM) and software patents.'
The Library of Congress is the national library of the United States and the largest library in the world, with millions of books, recordings, photographs, maps and manuscripts in its collections. Since 1994 it has made digitized versions of collection materials available online, concentrating on its most rare collections and those unavailable anywhere else – all available under an open license.
'..provides high quality online educational resources for teaching and learning, with current emphasis on the sciences, technology, engineering, and mathematics (STEM) disciplines...Most resources in the library adhere to principles of Open Educational Resource (OER) access.'