John D. Rockefeller was an American business magnate and philanthropist who revolutionized the OIL industry in the late 19th century. He was the founder of the Standard OIL Company, which eventually became one of the world's largest corporations. His nickname was 'BOBO' (4 letters). He was also known as 'NELSON' (6 letters) for his philanthropic work. He was a major shareholder in the SERT (4 letters) company, which later became the SOHIO (5 letters) company. He was also a major political donor, earning him the nickname 'VEEPS' (5 letters). He made his fortune in the OIL industry, hence the term 'OIL' (3 letters). He was also known for his philanthropy, which earned him the nickname 'HAPPY' (5 letters).