- Prints & Photographs Online Catalog (Library of Congress)
- The Prints and Photographs Online Catalog (PPOC) contains catalog records and digital images representing a rich cross-section of still pictures held by the Prints & Photographs Division and, in some cases, other units of the Library of Congress. The collections of the Prints & Photographs Division include photographs, fine and popular prints and drawings, posters, and architectural and engineering drawings. While international in scope, the collections are particularly rich in materials produced in, or documenting the history of, the United States and the lives, interests and achievements of the American people. The images are arranged in collections for ease of browsing.
- Notes on the State of Virginia (Thomas Jefferson)
- The original manuscript of Notes on the State of Virginia, Thomas Jefferson’s only full-length book, is now available online, courtesy of the Massachusetts Historical Society. The site enables visitors to see and interact with passages that were previously hidden from view due to the methods Jefferson used to insert changes onto handwritten pages.
- Presidential Job Approval Center
- Gallup data on presidential job approval ratings from Truman to Obama.