The Interactive Glossary: Defining the Net

Access Provider
Adobe Acrobat Reader
ActiveX
ADSL
Adware
Agent
Algorithm
Anchor
Android
Anonymous FTP
App
Applet
Archie
Archive
ARPANET
ASCII
Atom
Attribute
Autoresponder
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ARPANET

This is an acronym for Advanced Research Projects Administration Network, the computer network system that gave birth to the Internet. ARPANET began in 1969 as a U.S. Department of Defense experiment in packet-switched networking.

Learn more: Birth of the Net