American Internet pioneer (born 1943) and one of 'the fathers of the Internet,' who developed TCP/IP technology and the first commercial email system. Group of four items signed by Cerf: a handwritten statement on an 8.5 x 11 sheet, "I hope people will appreciate that Bob Kahn and I gave the Internet's design away without any constraints, patents or copyrights, deliberately, Vint Cerf"; a color satin-finish 8 x 10 photo, signed in black felt tip; a color glossy 7 x 5 photo, signed in gold ink; and a felt tip signature on a 3.5 x 1.5 card, encapsulated by PSA/DNA. In overall fine condition.