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 by Cerf: a desirable hand-drawn sketch of the "Internet ca. 1977," showing the gateways, hosts, and stations interconnecting ARPANET, SATNET, and PRNET; a glossy 5 x 7 portrait; a black 5.25″ floppy disk; and an FDC honoring computer technology. In very fine condition.