Judith Estrin

Networking companies. Estrin worked on early internet protocols in Vint Cerf's group at Stanford, then co-founded Bridge Communications in 1981 with her husband Bill Carrico, an early maker of equipment linking office computer networks, followed by Network Computing Devices and Precept Software, which Cisco bought. She later served as Cisco's chief technology officer. Her companies helped turn networking research into products businesses could buy.