Judy Estrin previously co-founded three technology companies with her husband, Bill Carrico. Bridge Communications was a vendor of internetwork routers and bridges that went public in 1985 and merged with 3Com Corporation in 1987; Estrin served as engineering vice president and executive vice president of Bridge, and later ran the Bridge Communications Division at 3Com. Network Computing Devices, a maker of X terminals and PC-UNIX integration software, went public in 1992; Estrin started with NCD as executive vice president and became CEO in 1993. Estrin served as CEO of Precept Software from the company's 1995 founding as a maker of streaming video software. When Precept was acquired by Cisco Systems in 1998, she became Cisco's chief technology officer until April 2000. Estrin has been named three times to Fortune Magazine's list of the 50 most powerful women in American business. In 2002, she was named to the WITI Hall of Fame which recognizes outstanding contribution of women to science and technology. She sits on the boards of directors of The Walt Disney Company, The Federal Express Corporation and Sun Microsystems. She holds a B.S. degree in math and computer science from UCLA, and an M.S. in electrical engineering from Stanford University.