William Henry Gates was born on 28 October 1955, in Seattle, Washington. As the principal founder of Microsoft, Bill Gates is one of the most influential and richest people on the planet. In recent years he has retired from working full time at Microsoft, and has instead concentrated on working with his charitable foundation “The Bill and Melinda Gates Foundation.” In 1973, Gates enrolled at Harvard, where he studied mathematics and computer science. However, Gates was more interested in pursuing his own coding, and when he saw an opportunity to found his own company, he dropped out of Harvard without finishing his course. Bill Gates founded Microsoft in 1976 when he formed a contract with MITS (Micro Instrumentation and Telemetry Systems) to develop a basic operating system for their new microcomputers. In the early days, Bill Gates would review every line of code. He was also involved in several aspects of Microsoft’s business such as packing and sending off orders. The big break for Microsoft came in 1980 when IBM approached them. In the early 1980s, IBM was by far the leading PC manufacturer. In 1990 Microsoft released its first version of Windows. It soon became a best seller and was able to capture the majority of the operating system market share. In 1995 Windows 95 was released, setting new standards and features for operating systems. This version of Windows has been the backbone of all future releases from Windows 2000 to the latest XP and Vista. Throughout his time in office, Bill Gates has been keen to diversify the business of Microsoft. Although Microsoft was the dominant computer firm of the 1980s, and 1990s, they are now seen as an ageing and declining company – compared to the more dynamic Google and Apple. Bill Gates is married to Melinda French. With his wife, Bill Gates formed the Bill & Melinda Gates Foundation. Bill Gates says much of the inspiration came from the example of David Rockefeller. Like Rockefeller, Gates has sought to focus on global issues ignored by the government; he also expressed an interest in improving the standards of public school education in the US. From 2008 Gates has worked full time on his philanthropic interests. It is estimated Gates and his wife Melinda have given away $28 billion via their charitable foundation – including $8 billion to improve global health. His main areas of interest in philanthropy have been improving health, and in particular helping to reduce diseases, such as polio which affect young children. He has also given more focus to environmental issues. In 2015, he gave $1 billion to a clean energy project, as he sees supporting new ‘greener’ technologies as a way to help deal with global warming.