History - General
- American Folklife Center (Library of Congress)
- American Memory (Library of Congress)
- Archival Research Catalog (ARC) – National Archives
- Core Documents of Our Democracy
- CyberCemetery – Former Federal Websites (University of North Texas Libraries/GPO)
- FDsys – GPO's Federal Digital System. Now: GovInfo
- Foreign Relations of the United States
- GovInfo (Discover U.S. Government Information)
- Government Manual, United States
- Historical Statistics of the United States (1789-1945)
- Historical Statistics of the United States (Colonial Times to 1970 – Bicentennial Edition)
- Library of Congress
- National Archives and Records Administration (NARA)
- National Park Service
- National Security Archive (George Washington University)
- Our Documents: 100 Milestone Documents of American History
- Public Papers of the Presidents of the United States
- Smithsonian Institution
- World Factbook (CIA)