In the world of technology, Bill Gates' biggest achievements are the creation of the MS-DOS and Windows operating systems and growing Microsoft into one of the world's biggest companies. In addition, the Bill & Melinda Gates Foundation is one of the world's largest charity organizations as of 2014.
MS-DOS was originally the world's most widely used operating system on PCs, surpassed only by the introduction of Windows. The success of these operating systems made Microsoft one of the world's most valuable companies, a position it continues to hold, as of 2014. When the company went public in 1986, Bill Gates became a billionaire and went on to become one of the world's wealthiest men. At one point in his career, in 1996, Gates was earning approximately $30 million a day. As of April 2015, his personal net worth is an estimated $78.5 billion, making him the world's wealthiest individual by several billion dollars.
The Bill & Melinda Gates Foundation works as a force in improving health care, promoting efficient and responsible agriculture and providing financial services for the extremely poor in developing areas of the world. Some of the organization's major projects have included funding disaster relief, providing vaccinations, and promoting HIV awareness and research.