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October 29, 1969 CE / Americas

ARPANET: The First Message on an Internet Precursor

Researchers in California sent the first ARPANET message; experiments in packet switching and networking across institutions laid foundations for the later development of the internet.

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Era
Modern World
Region
Americas
Theme
Technology
An imagined early twenty-first-century city: a tram passes a plaza where people walk, cycle and gather by trees and streetside shops.
An AI-generated imagined historical panorama suggests everyday life. It is not evidence for reconstructing a specific event or archaeological site.

The story

On the evening of October 29, 1969, researchers at the University of California, Los Angeles attempted to send a login command to the Stanford Research Institute. The system failed after transmitting the first two letters, and the connection test was subsequently completed. Supported by the U.S. Advanced Research Projects Agency, ARPANET connected computers at different research institutions to explore packet switching and resource sharing. The initial network was very small, and its development depended on multiple universities, engineering teams, and continued protocol design. It was an important precursor of the internet, but was not equivalent to today's global internet, much less the later World Wide Web used to browse web pages.

Elsewhere in the world

This experiment took place amid Cold War investment in research and the expansion of global communications infrastructure, sharing the environment of large public research projects with the crewed Moon landing that same year.

Dates and precision

October 29, 1969 CE Documented date

Positioned by the documented year, month or day; missing months and days are not inferred.

Representative map location

Representative coordinates · 34.069°, -118.443°

Coordinates locate a representative point for the story. They do not mean the event happened only here and do not represent historical borders.

Bibliography

  • U.S. Defense Advanced Research Projects Agency, DARPA | ARPANET

Sources are listed as bibliography titles, without external links. A reference does not mean every sentence or interpretation has been independently verified.

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Read this era · Modern WorldRead this region · Americas

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