American entrepreneur who founded Silicon Graphics, Netscape, Healtheon, and myCFO — the first person to found three separate billion-dollar companies — providing the risk capital and entrepreneurial credibility that enabled Marc Andreessen to launch Netscape.
Founded Netscape by recruiting Marc Andreessen and funding the commercialization of the Mosaic browser — creating the first major commercial internet company and triggering the dot-com era — while Silicon Graphics invented the 3D graphics workstation market.
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