Judy Estrin is President & CEO of Packet Design, LLC, a network technology company she co-founded in May 2000. Prior to co-founding Packet Design, LLC, Estrin was Chief Technology Officer for Cisco Systems. Beginning in 1981 Estrin co-founded three other successful technology companies with Bill Carrico. Bridge Communications, founded in 1981, was a vendor of internetwork routers and bridges that went public in 1985 and merged with 3Com Corp. 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, was founded in 1988 and 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 until Cisco Systems acquired Precept in 1998, and 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. She sits on the boards of directors of The Walt Disney Company and The Federal Express Corporation as well as two private company boards -- Packet Design, Inc. and Arch Rock. She also sits on the advisory councils of Stanford's School of Engineering and Stanford's Bio-X initiative. She holds a B.S. degree in math and computer science from UCLA, and an M.S. in electrical engineering from Stanford University.