Vint Cerf Sketch Signed.

Rare autograph sketch signed by internet pioneer Vint Cerf. One page, the sketch draws a set of connections between Packet Radio Network (PRNET), Advanced Research Projects Agency Network (ARPANET), and Atlantic Packet Satellite Network (SATNET). Boldly signed in black felt tip. In fine condition. A fine and rare example of the inventive process behind this modern marvel.