World Richest Man

Taken from http://www.forbes.com. Here are the top 20 richest man.
William Gates III (Bill Gates)
Warren Buffett
Carlos Slim Helú
Lawrence Ellison
Ingvar Kamprad
Karl Albrecht
Mukesh Ambani
Lakshmi Mittal
Theo Albrecht
Amancio Ortega
Jim Walton
Alice Walton
Christy Walton
S Robson Walton
Bernard Arnault
Li Ka-shing
Michael Bloomberg
Stefan Persson
Charles Koch
David Koch

The link is here http://www.forbes.com/2009/03/11/worlds-richest-people-billionaires-2009-billionaires_land.html