The first internet message ever sent was "LO"Matt Novak7/03/14 11:00am194EditPromoteDismissUndismissHideGo to permalinkAbove, is the log book from UCLA documenting the first host-to-host connection of the ARPANET, the precursor to our modern internet. It was 10:30pm on October 29, 1969. The first message ever sent? "LO." They were trying to type LOGIN, but it crashed before they could finish.