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Marc Andreessen

Marc Lowell Andreessen is an American entrepreneur, investor, software engineer, and multi-millionaire. He is best known as co-author of Mosaic, the first widely used Web browser; as co-founder of Netscape Communications Corporation; and as co-founder and general partner of Silicon Valley venture capital firm Andreessen Horowitz. He founded and later sold the software company Opsware to Hewlett-Packard.

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