Bill Gates announced that he would be transitioning from full-time work at Microsoft to part-time work and full-time work at the Bill & Melinda Gates Foundation, which was established in 2000. He gradually transferred his duties to Ray Ozzie and Craig Mundie. He stepped down as chairman of Microsoft in February 2014 and assumed a new post as technology adviser to support the newly appointed CEO Satya Nadella. Gates is one of the best-known entrepreneurs of the personal computer revolution. He has been criticized for his business tactics, which have been considered anti-competitive. This opinion has been upheld by numerous court rulings.
Bill Gates retail version of Microsoft Windows on November 20, 1985. In August of the following year, the company struck a deal with IBM to develop a separate operating system called OS/2. Although the two companies successfully developed the first version of the new system, the partnership deteriorated due to mounting creative differences. From Microsoft's founding in 1975 until 2006, Gates had primary responsibility for the company's product strategy. He gained a reputation for being distant from others; as early as 1981 an industry executive complained in public that "Gates is notorious for not being reachable by phone and for not returning