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Nature 461, 1202-1203 (29 October 2009) | doi:10.1038/4611202a; Published online 28 October 2009

Open Innovation Challenges

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The day the Internet age began

Vinton G. Cerf1

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Forty years ago today the first message was sent between computers on the ARPANET. Vinton G. Cerf, who was a principal programmer on the project, reflects on how our online world was shaped by its innovative origins.

On 29 October 1969, Charley Kline, a student in the Network Measurement Center at the University of California, Los Angeles (UCLA), sent the first ever message from one computer to another on the ARPANET. The other computer was in the Stanford Research Institute, 500 kilometres to the north.