Includes links to open textbooks which have been approved by AIM to serve as the primary text in a mainstream mathematics at the undergraduate level. Also includes links to AIM's evaluation criteria and a guide for authors of open textbooks.
Free, openly licensed computer science texts by O'Reilly Media author Allen B. Downey.
NOTE: Works created by U.S. federal government agencies are usually, but not always, in the public domain. These works may be protected by copyrignt, in whole or in part, especially if they were created by private subcontractors or include any content originally created by private third parties. Always check to confirm that the resource does not contain any copyright notices before assuming that it's free to use as an OER.