James H. Clark

Lore & Background

Clark was born in Plainview, Texas, on March 23, 1944. He dropped out of high school at 16 and spent four years in the US Navy, where he was introduced to electronics. He began taking night courses at Tulane University's University College and, despite his lack of a high school diploma, earned enough credits to be admitted to the University of New Orleans. There, he earned his bachelor's and master's degrees in physics, followed by a Ph.D. in computer science from the University of Utah in 1974. After completing his doctorate, Clark worked at the New York Institute of Technology's Computer Graphics Lab, but was fired due to insubordination. He served as an assistant professor at the University of California, Santa Cruz (1974-1978) before moving to Stanford University as an associate professor of electrical engineering (1979-1982). His research concerned geometry pipelines, and the peak of his group's advancements was the Geometry Engine, an early hardware accelerator for rendering computer images based on geometric models, developed in 1979 with his students at Stanford.

In 1982, Clark and several Stanford graduate students founded Silicon Graphics (SGI). The earliest SGI graphical workstations were mainly terminals, followed by stand-alone graphical Unix workstations with very fast graphics rendering hardware. By 1991, Silicon Graphics had become the world leader in the production of Hollywood movie visual effects and 3-D imaging. Clark departed in late January 1994 due to differences with management. In February 1994, he sought out Marc Andreessen, who had led the development of Mosaic, and they founded Netscape. The founding of Netscape and its IPO in August 1995 launched the Internet boom on Wall Street. Clark's initial investment of $4 million in 1994 yielded $1.2 billion when Netscape was acquired by AOL in 1999. In 1995, Clark became interested in streamlining health-care paperwork, leading to the founding of Healtheon in early 1996. Healtheon later merged with WebMD to form the WebMD Corporation.

Reader's Guide

James H. Clark's significance lies in his role as a serial entrepreneur who helped shape the modern technology landscape. His founding of Silicon Graphics advanced computer graphics hardware, enabling the fast rendering of three-dimensional images that became essential for Hollywood visual effects and scientific visualization. With Netscape, Clark and Marc Andreessen created the first widely used commercial web browser, Netscape Navigator, which catalyzed the Internet boom of the mid-to-late 1990s and transformed how people access and exchange information. His later ventures, including Healtheon (which became WebMD) and myCFO, applied technology to streamline health-care administration and wealth management. Clark's career illustrates the transition from academic research in computer graphics to commercial innovation, and his investments and board memberships in companies such as Neoteris, DNA Sciences, and Ibotta reflect ongoing involvement in technology startups. His election to the National Academy of Engineering in 1998 recognized his contributions to computer graphics and technical leadership. Clark's personal life, including his yachting pursuits and ownership of notable sailing yachts like Hyperion and Comanche, also attracted public attention.

Did You Know?

• Clark dropped out of high school at 16 and later earned a Ph.D. in computer science from the University of Utah.
• He was fired from the New York Institute of Technology's Computer Graphics Lab due to insubordination.
• Clark's initial $4 million investment in Netscape grew to $1.2 billion when AOL acquired the company in 1999.
• He coproduced the 2009 film The Cove, which addresses dolphin killing in Taiji, Wakayama, Japan.