Business News Bill Gates Reveals His $400 Billion Mistake That Cost Microsoft Greatly Bill Gates, co-founder of Microsoft, recently disclosed what he considers the greatest mistake of his career—a misstep More… Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Al Marmoom: Film in the Desert Honors Filmmakers and Concludes its Fourth Edition Canada could impose tariffs on $105 billion worth of US imports, source says