29 OCT--This Day in US Military History

1969 – The first-ever computer-to-computer link is established on ARPANET, the precursor to the Internet.

The first message on the ARPANET was sent by UCLA student programmer Charley Kline, at 10:30 pm, from Boelter Hall 3420. Kline transmitted from the university’s SDS Sigma 7 Host computer to the Stanford Research Institute’s SDS 940 Host computer. The message text was the word login; the l and the o letters were transmitted, but the system then crashed. Hence, the literal first message over the ARPANET was "lo".
About an hour later, having recovered from the crash, the SDS Sigma 7 computer effected a full login.
The first permanent ARPANET link was established on 21 November 1969, between the IMP (router) at UCLA and the IMP at the Stanford Research Institute.
By 5 December 1969, the entire four-node network, adding University of California, Santa Barbara and The University of Utah, was established.

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