This Day in History: November 21

Today: January 20, 2017
First ARPANET Link Put Into Service
First ARPANET IMP log--a record of the first message ever sent over the ARPANET, which was transmitted at 10:30 pm on October 29, 1969

November 21, 1969

First ARPANET Link Put Into Service

ARPANET was an early computer network developed by J.C.R. Licklider, Robert Taylor, and other researchers for the U.S. Department of Defense’s Advanced Research Projects Agency (DARPA). It connected a computer at UCLA with a computer at the Stanford Research Institute, Menlo Park, CA. In 1973, the government commissioned Vinton Cerf and Robert E. Kahn to create a national computer network for military, governmental, and institutional use. The network used packet-switching, flow-control, and fault-tolerance techniques developed by ARPANET. Historians consider this worldwide network to be the origin of the Internet.