The list of the world's richest contains a host of household names - from Bill Gates to Warren Buffet, from Carlos Slim Helu to Larry Ellison - but only one of the world's richest Arabs. Click on any entry for a biography of how they have made their money, and in some cases what they plan to do with it.

Below the Forbes Top 20 billionaires, we have compiled the richest people in each region of the world. Use the list to find out who's top of the pile in Europe, the Far East, Russia, India, Australia and Africa...