National Security Decision Directives (NSDD) were issued by President Ronald Reagan and his Assistants to the President for National Security Affairs to set forth official national security policy for the guidance of the defense, intelligence, and foreign policy establishments of the United States Government. Presidential administrations have issued similar numbered papers to guide policy since the formation of the National Security Council (NSC) in 1947. Each directive was given a number assigned in sequence in order of issuance. The originals of these documents are presidential records in the custody of the NSC. As the NSC declassifies and releases NSDDs, public reference copies are placed with the National Archives at College Park, Maryland and the Ronald Reagan Presidential Library in Simi Valley, California.