Bill Gates away half of its value, as detailed in "The Power of Half". Gates and his wife invited Joan Salwen to Seattle to speak about what the family had done, and on December 9, 2010, Bill and Melinda Gates, and investor Warren Buffett signed a commitment they called the "Giving Pledge." The pledge is a commitment by all three to donate at least half of their wealth over the course of time to charity. Gates has also provided personal donations to educational institutions. In 1999, Gates donated $20 million to the Massachusetts Institute of Technology (MIT) for the construction of a
Bill Gates operating system, because he believed that other hardware vendors would clone IBM's system. They did, and the sales of MS-DOS made Microsoft a major player in the industry. Despite IBM's name on the operating system, the press quickly identified Microsoft as being very influential on the new computer. "PC Magazine" asked if Gates were "the man behind the machine?", and "InfoWorld" quoted an expert as stating "it's Gates' computer". Gates oversaw Microsoft's company restructuring on June 25, 1981, which re-incorporated the company in Washington state and made Gates the president of Microsoft and its board chairman. Microsoft launched its first