Robert Kahn American (1938-). Electrical engineer who invented TCP/IP protocols with fellow UCLA alumnus Vint Cerf. Worked closely with Cerf after recruiting him to continue development of ARPANET, in 1973. Also with Cerf, served on Internet Engineering Task Force, getting ARPANET up and running. In 1972, Kahn demonstrated ARPANET’s packet-switching technology at a public conference, considered a watershed event in development of the internet.