The Public Papers of the Presidents have been published for every president since Herbert Hoover in 1929. The volumes contain a compilation of speeches, press conferences, public messages, etc. Executive orders and proclamations were not regularly included until 1977 (beginning with the Jimmy Carter administration), the sources below include an archive of these documents.
There are many records and papers produced by agencies that never get released. They are not actually classified they are just considered internal departmental documents and are therefore not published. Records like these as well as other published and classified documents eventually end up at NARA. Although NARA puts select material online, there is even more material that is available only on microfiche or at one of the National Archives locations.
Many Government Documents from the last 20 years and frequently used historical documents can be found in the Libraries Catalog just like other books. We have many additional documents dating back to the 1860s that are not included in the catalog. They are located at the off campus Locust Street Library Facility and can be viewed by appointment, or sent by request to Pius Library. Contact Rebecca Hyde for more details. The resources below can help you identify documents we may have.