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ARPANET

Timeline
Initial napkin sketch from 1969 showing the initial four nodes of the ARPANET

ARPA research played a central role in launching the “Information Revolution,” including developing or furthering much of the conceptual basis for ARPANET, a pioneering network for sharing digital resources among geographically separated computers. 

Its initial demonstration in 1969 led to the Internet, whose world-changing consequences unfold on a daily basis today. 

A seminal step in this sequence took place in 1968 when ARPA contracted BBN Technologies to build the first routers, which one year later enabled ARPANET to become operational.

Read the ARPANET feature

Redefining Possible 

Since 1958, DARPA has been an engine of innovation serving national defense and the U.S. warfighter.

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