A computer network allows sharing of resources and information among devices connected to the network. The Advanced Research Projects Agency (ARPA) funded the design of the "Advanced Research Projects Agency Network" (ARPANET) for the United States Department of Defense. It was the first operational computer network in the world.Development of the network began in 1969, based on designs developed during the 1960s. For a history see ARPANET, the first network.

 Network classification

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