The printed version of the Factbook is published annually in July by the Central Intelligence Agency for the use of US Government officials, and the style, format, coverage, and content are designed to meet their specific requirements. Information was provided by the American Geophysical Union, Bureau of the Census, Central Intelligence Agency, Defense Intelligence Agency, Defense Mapping Agency, Defense Nuclear Agency, Department of State, Foreign Broadcast Information Service, Maritime Administration, National Science Foundation (Polar Information Program), Naval Maritime Intelligence Center, Office of Territorial and International Affairs, US Board on Geographic Names, US Coast Guard, and others.