Currently there are six: North America, Latin America, Western Europe, Africa and the Middle East, East Asia, and the Soviet Union and Eastern Europe. Each group has a special library.
目前已分為北美、拉丁美洲、西歐、非洲和中東、東亞、蘇聯與東歐六個小組，各組下又設有圖書館專門收集史料。