ARPA

The acronym ARPA has several meanings:

• The .arpa domain name expands to "Address and Routing Parameter Area"
• Advanced Research Projects Agency was renamed to Defense Advanced Research Projects Agency (DARPA) in 1972
• Automatic Radar Plotting Aid
• Average Revenue Per Advertiser
• Archaeological Resources Protection Act

Also:

• The Arpa is a river in Armenia.
• Italian for harp, sometimes used in scores.

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