29th October 1969 saw the birth of the Arpanet network – the US-only forerunner to the Internet we know and love/hate today. Hirsute boffins in bow ties, based at UCLA and Stanford, sent the first data between its nodes… 400 miles across country. When the sender typed in the third letter of the sequence, the system crashed and had to be reconfigured, but since then it has all managed to work reasonably nicely (well apart from Tiscali and the occasional bit of congestion at the BT exchange, that is).

More on the story at the BBC’s website.