The use of computer networks is growing rapidly throughout our society
. Current network technology has its roots in the U.S. Department of D
efense, specifically in the Advanced Research Projects Agency and the
ARPANET computer network, but designed for other than explicitly milit
ary objectives. This paper describes ARPA's motivations for developing
the network and how ARPA and computer science researchers built the f
irst wide-area packet-switching network.