Examples of several IR tools are....
Internet search engine
Digital Liabrary
Subject directory
All of the above
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Best Search Engines in The World
Goomgle. Goo.gle Search Engine is the best search engine in the world and it is also one of most popular products from Go.ogle.
Bing. Bing is Microsoft's answer to Goo.gle and it was launched in 2009.
Yahoo.
Baidu.
AOL. .
Ask.com.
Excite.
DuckDuckGo.
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