MOUNTAIN VIEW, CA - MAY 4:  Google's headquarters in Mountain View, California is shown May 4, 2004. Google Inc., the world's No. 1 Web search provider, filed with U.S. regulators on April 29, 2004 to become a publicly listed company and sell as much as $2.7 billion in stock in a widely expected initial public offering.  (Photo by David Paul Morris/Getty Images)