The world’s second-wealthiest individual, Spanish retail executive Amancio Ortega, is worth more than $76 billion Bill Gate is one of the most philanthropic billionaires by donating huge sums of money over the years through the Bill and Melinda Gates Foundation. He also supported several causes, including clean water and eradicating malaria in areas like Africa. Bill Gates and Paul Allen co-founded Microsoft in 1975 and it became the world’s largest PC software company. Gates is one of the best-known entrepreneurs of the personal computer revolution. His father was a prominent lawyer, and his mother served on the board of directors for First Interstate BancSystem and the United Way. Gates’ parents had a law career in mind for him. Gates was an active software developer in Microsoft’s early history, particularly on the company’s programming language products, but his role most of its history was primarily as management and executive.