What are the important contributions of Bill Gates-co-founder of Microsoft Corporation.

Bill Gates is co-founder of Microsoft Corporation,the world's leading provider of software for personal computers.In 1973,Gates entered Harvard University as as freshman.In his junior year,Gates dropped out of Harvard to devote his energies full-time to Microsoft,a company he had started in 1975 with his boyhood friend Paul Allen.Guided by a belief that the personal computer would be a valuable tool on every office office desktop and in every home,they began developing software for personal computers.
    Gates foresight and vision regarding personal computing have been central to the success of Microsoft and the software industry.Until recently, Gates played an important role in the technical development of new products.Much of his time is devoted to meeting with customers and staying in contact with Microsoft employees around the world through e-mail.
     In 1995,Gates wrote 'The Road Ahead' his vision of where information technology will take society.In addition to his passion for computers,Gates is interested in biotechnology.Bill Gates bid goodbye to Microsoft on 27 June 2008.He will now focus attention on charity at the helm of Bill and Melinda Gates foundation.