DuckDuckGo is an Internet search engine that uses information from crowdsourced websites such as Wikipedia to obtain its results. The search engine policy says that it protects privacy, and does not record user information. Because users are not profiled, the “filter bubble” can be avoided, with all users being shown the same search results for a given search term. Some of the code of DuckDuckGo is free software distributed at GitHub under the Perl 5 license.
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