We actually had to modify this fact due to recent changes in the billionaire world. Thirteen years our buddy Bill Gates from Winblows was the richest man in the world. However, as of 2008 the top five richest people are: 1. Warren Buffett (Stocks and investments), 2.Carlos Slim Helu (Mexican telecom mogul), 3. William Gates III (Windows and more), 4. Lakshmi Mittal (World’s largest steelmaker – India), 5. Mukesh Ambani (Petrochemicals giant Reliance Industries – India). We will try to update this list as soon as rich get richer.