American Internet pioneer (born 1943) and one of 'the fathers of the Internet,' who developed TCP/IP technology and the first commercial email system. Two items: an original sketch of the various layers of the Internet Protocol Suite on a white 8 x 5 sheet, accomplished in black felt tip by Cerf, who signs below; and a color glossy 10 x 8 half-length photo of Cerf in an explanatory pose, signed in black felt tip by Cerf, who adds "Internet father." In overall fine condition. Accompanied by a personal Google business card belonging to Cerf, who has signed the card in black ballpoint.