Arpanet

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Arpanet

The first digital network that utilized packet switching, which is the transmission of data, regardless of content, in manageable chunks called packets. This was a revolutionary technology and ultimately led to the creation of the modern Internet. It was developed in the 1960s by the Defense Advanced Research Projects Agency.
References in periodicals archive ?
Once TCP/IP was widely accepted, DARPAnet became the broadly accessible Internet.
This trend makes sense, given that electronic mail was one of the first applications for Internet communication, dating back to the original ARPA and DARPANET.
DARPA is the research element within the Department of Defense and has been responsible for funding development and implementation of many breakthrough technologies, including most notably the Internet, which was originally called DARPANET.