American Internet pioneer (born 1943) and one of 'the fathers of the Internet,' who developed TCP/IP technology and the first commercial email system. Four items signed in ink or felt tip by Internet pioneer Vint Cerf, including: a personal Google business card belonging to Cerf; an off-white 5 x 3 card; a color satin-finish 5 x 7 photo; and an AQS on a white 8.5 x 11 sheet with typed question asking Cerf which of his achievements means to the most to him; Cerf's response: "Turning the Internet on, January 1, 1983!" In overall fine condition.