American Internet pioneer (born 1943) and one of 'the fathers of the Internet,' who developed TCP/IP technology and the first commercial email system. Three items signed in black ballpoint or felt tip by Vint Cerf—an original sketch by Cerf of a diagram of the "Internet Protocol Suite” on a white 10.5 x 8.5 sheet of glossy paper; a glossy 8 x 10 photo of Cerf in earlier age in front of a chalkboard; and his personal 3.5 x 2 Google business card. In overall fine condition, with light corner creasing to the sketch.