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 ballpoint sketch of the "3-network Internet test using TCP/IP protocols" on a white 8 x 5 sheet, signed below by Cerf; and a color glossy 10 x 8 photo of the handsomely dressed Cerf against a pixelated backdrop, signed in silver ink by Cerf, who adds, "One of the fathers of the Internet." In overall fine condition. Accompanied by a personal Google business card belonging to Cerf, who has signed the card in black felt tip.