Considered by many to be Silicon Valley's most important entrepreneur, he has venture capitalists hanging on his every word.

He fathered two of the computer industry's most important companies, Silicon Graphics and Netscape, making billions from each one respectivly. His current project is an online health care venture, Healtheon Corp., which is also rumored to be worth billions.
Silicon graphics transformed three dimensional imaging with their combination of software and hardware that was streets ahead of any of their competitors. This was because Clark knew who the smart engineers were and how to nurture them.

Clark is famous for his love of machines, be it model helicopters or his obsession to build the worlds tallest sailing boat, the Hyperion.

He is also famous for the contempt he holds for Microsoft for monopolising the software industry and sees the world of application development being held back by their platforms and development techniques.