James H. Clark And Marc L. Andreessen

JAMES H. CLARK, 50, founder of Silicon Graphics, has done it again. His Netscape Communications makes the Internet's top software. Clark took it public 18 months after founding it with cyberwizard MARC L. ANDREESSEN, 24. Its market cap is now $5 billion. Now, that's an IPO!

Before it's here, it's on the Bloomberg Terminal.