The World Factbook - The World Factbook Every flag has a story View flags of all the world’s countries and territories to learn the symbolism behind each design
United States - The World Factbook The United States entry in The World Factbook provides a comprehensive overview of the country's geography, people, society, government, economy, and more
Real GDP (purchasing power parity) - The World Factbook Compares the gross domestic product (GDP) or value of all final goods and services produced within a nation in a given year A nation's GDP at purchasing power parity (PPP) exchange rates is the sum value of all goods and services produced in the country valued at prices prevailing in the United States