The first ARPANET log entry, 29 October 1969

OCT 29 1969

The handwritten IMP log from UCLA recording the first host-to-host login over the ARPANET, the network on which Creeper would later propagate. Charles S. Kline's entry notes that the system crashed after two characters of 'LOGIN'. This is the founding document of the network whose openness every later attack depended on.