James Clark is a prominent American businessman best known for co-founding the popular web browser Netscape. He played a significant role in the development of the internet during the 1990s, helping to popularize web browsing and online communication. In addition to Netscape, Clark has been involved in several successful ventures, including MySpace and Facebook. His entrepreneurial spirit and innovative ideas have made him a key figure in the tech industry, influencing the way people interact with technology today.