A billionaire, in countries that use the short scale number naming system, is a person with a net worth of at least one billion (1,000,000,000) units of a given currency, usually major currencies such as the United States dollar, the euro, or the pound sterling. Forbes magazine updates a complete global list of known U.S. dollar billionaires every year. John D. Rockefeller was the first billionaire in history, accomplishing this feat in 1916. In the entire world there are just 1,011 billionaires-individuals with over $1,000 million in assets.