Most of the documentation included in Foreign Relations of the United States (FRUS) is declassified for the first time there. Beyond FRUS, information made available through declassification or Freedom of Information Act requests has been collected, indexed and microfilmed or digitized by several publishers:

Declassified Documents Reference System (DDRS)

Indexes declassified documents under specific subject headings, provides a brief description of each document and provides a microform copy of the actual document. The material in the DDRS originated primarily in the Central Intelligence Agency, the State Department, and various components of the Department of Defense; but it also includes documents from the National Security Council, the White House, and the Federal Bureau of Investigation. The documents range in size and scope from telegrams, correspondence and unevaluated field reports to lengthy background studies and detailed minutes of cabinet-level meetings. The DDRS began with a retrospective compilation (those declassified from 1972-1975) and has issued quarterly, or now bimonthly, compilations since that time. The DDRS indexes and microfiche collection are housed in the Government Documents and Information Center. A subset of the documents are available in full text online (but see this caveat about what is available).

Digital National Security Archive

The National Security Archive, a research institute at George Washington University, collects, organizes, and creates finding aids and other retrieval systems unclassified and declassified materials. The collections are organized by subject areas relating to the making of United States foreign policy.

University Publications of America collections on microform

UPA has since 1974 published many microform collections from among the declassified documents of the U.S. federal government. Its editorial policy is to film collections without reorganization or substantive editorial intervention whenever possible and most of UPA's collections meet these criteria. Among the many examples of this type of collection are the Confidential U.S. State Department Central Files, the National Security Files, 1961-1969, the documents and meetings of minutes of the National Security Council, and the Peonage Files of the U.S. Department of Justice. To determine and locate Yale University Library's holdings of these collections, search Orbis by keyword="University Publications of America".

Web sites

Declassified documents freely available on the web can be found at federal agencies' web sites (search the agency's site for "foia" or "electronic reading room"), from presidential libraries, research institutes, or other sites, sometimes presented by subject. Below is a sample of such sites:

• CIA Electronic Reading Room
• FBI Electronic Reading Room
• State Department Electronic Reading Room
• Gulflink (documents relating to the Persian Gulf War)
• OPENNET (Dept. of Energy)
• Presidential Recordings Program (University of Virginia, Miller Center of Public Affairs)
• The Vietnam War Declassification Project