


A third series within the White House Central Files, the General File, acts as an index, primarily by name, to both the Official File and the President's Personal File. Since documents received by the White House often contained a mixture of personal and official information, the distinction between the two series is very imprecise. The companion Official File (OF), in contrast, contains materials interpreted as being primarily official or semi-official in nature. The President’s Personal File contains materials interpreted by the White House Central Files unit as being primarily political, social or ceremonial in character. The President’s Personal File (PPF) is one of the four principal series within the White House Central Files, the other three being the Official File, the General File, and the Confidential File. Copyright interest in documents which do not fall in these two categories is presumed to remain with the writers of the documents.

In addition, documents prepared by United States Government employees in the course of their official duties are also in the public domain.
