As an undergraduate at the University of Illinois in

Champaign, Andreessen created the Mosaic web browser

prototype with a team of students and staff at the

university's National Center for Supercomputing Applications

(NCSA). With a friendly, point-and-click method for

navigating the Internet and free distribution to network

users, NCSA Mosaic gained an estimated two million users

worldwide in just over one year. Andreessen earned his

bachelor of science degree in computer science at the

University of Illinois in 1993.