The best search engines on the internet will depend on the kind of information the user is looking for though there are some that are accepted by most users as being helpful such as; Google, Abilock's article, Metacrawler, AltaVista and Profusion.
Personally, I like Bing from Microsoft, because it provides information only about the topic you are searching for, not a search where if it has one word from your search that isn't the topic you want that comes up instead. wiki.answers.com
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