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Marc Lowell Andreessen ( ann-DREE-sən; born July 9, 1971) is an American entrepreneur, venture capital investor, and software engineer. He is the co-author of Mosaic, the first web browser on graphical user interface; co-founder of Netscape; and co-founder and general partner of Silicon Valley venture capital firm Andreessen Horowitz. He co-founded and later sold the software... Wikipedia