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DuckDuckGo is an Internet search engine that emphasizes protecting searchers' privacy and avoiding the filter bubble of personalized search results.〔 DuckDuckGo distinguishes itself from other search engines by not profiling its users and by deliberately showing all users the same search results for a given search term. DuckDuckGo emphasizes getting information from the best sources rather than the most sources, generating its search results from key crowdsourced sites such as Wikipedia and from partnerships with other search engines like Yandex, Yahoo!, Bing, and Yummly. The company is based in 20 Paoli Pike, Paoli, Pennsylvania, United States, in Greater Philadelphia, and has 21 employees. The company name originates from the children's game duck, duck, goose.〔Arthur, Charles. "(NSA scandal delivers record numbers of internet users to DuckDuckGo )." ''The Guardian''. July 10, 2013. Retrieved July 10, 2013.〕 Some of DuckDuckGo's source code is free software hosted at GitHub under the Apache 2.0 License, but the core is proprietary. On 21 May 2014, DuckDuckGo launched a redesigned version that focused on smarter answers and a more refined look. The new version added often requested features such as images, local search, auto-suggest and more. On 18 September 2014, Apple included DuckDuckGo in its Safari browser as an optional search engine.〔(【引用サイトリンク】title=Big Win For DuckDuckGo: Apple Adding To Safari As Private Search Option )〕〔(【引用サイトリンク】title=Apple - OS X Yosemite - Apps )〕 On 10 November 2014, Mozilla added DuckDuckGo as a search option to Firefox 33.1.〔(【引用サイトリンク】url=https://www.mozilla.org/en-US/firefox/33.1/releasenotes/ )〕 == History == DuckDuckGo was founded by Gabriel Weinberg,〔(【引用サイトリンク】url=http://www.eyerys.com/articles/people/search-engine-and-privacy-gabriel-weinberg )〕 an entrepreneur whose last venture, The Names Database, was acquired by United Online in 2006 for $10 million. Initially self-funded by Weinberg, DuckDuckGo is now advertising-supported.〔(【引用サイトリンク】title=Duck Duck Go Startup Profile )〕 The search engine is written in Perl and runs on nginx, FreeBSD and Linux. DuckDuckGo is built primarily upon search APIs from various vendors. Because of this, TechCrunch characterized the service as a "hybrid" search engine. At the same time, it produces its own content pages, and thus is similar to Mahalo, Kosmix and SearchMe.〔(【引用サイトリンク】title=Duck Duck Go Company Profile )〕 The name of the search engine has been called "silly" by Frederic Lardinois of ''Read Write Web''. Weinberg explained the beginnings of the name with respect to the children's game duck, duck, goose. He said of the origin of the name, "Really it just popped in my head one day and I just liked it. It is certainly influenced/derived from duck duck goose, but other than that there is no relation, e.g., a metaphor." DuckDuckGo has been featured on TechCrunch's Elevator Pitch Friday〔 and it was a finalist in the BOSS Mashable Challenge. In July 2010, Weinberg started a DuckDuckGo community website to allow the public to report problems, discuss means of spreading the use of the search engine, request features, and discuss open sourcing the code. In September 2011 DuckDuckGo hired its first employee, Caine Tighe. The next month, Union Square Ventures invested in DDG. Union Square partner Brad Burnham stated, "We invested in DuckDuckGo because we became convinced that it was not only possible to change the basis of competition in search, it was time to do it." In addition, Trisquel, Linux Mint and the Midori web browser switched to use DuckDuckGo as their default search engine. By May 2012, the search engine was attracting 1.5 million searches a day. Weinberg reported that it had earned in revenue in 2011 and had three employees, plus a small number of contractors. Compete.com estimated 277,512 monthly visitors to the site in August 2012.〔(【引用サイトリンク】title=DuckDuckGo Analytics Profile )〕 On April 12, 2011, Alexa reported a 3-month growth rate of 51%.〔(【引用サイトリンク】title=DuckDuckGo Analytics Profile )〕 DuckDuckGo's own traffic statistics show that in August 2012 there were 1,393,644 visits per day, up from an average of 39,406 visits per day in April 2010 (the earliest data available).〔〕 In a lengthy profile in November 2012, the ''Washington Post'' indicated that searches on DuckDuckGo numbered up to 45,000,000 per month in October 2012. The article concluded "Weinberg's non-ambitious goals make him a particularly odd and dangerous competitor online. He can do almost everything that Google or Bing can’t because it could damage their business models, and if users figure out that they like the DuckDuckGo way better, Weinberg could damage the big boys without even really trying. It's asymmetrical digital warfare, and his backers at Union Square Ventures say Google is vulnerable."〔 GNOME replaced Google Search with DuckDuckGo as the default search engine in Web, the default GNOME web browser, starting with version 3.10, which was released on September 26, 2013. At its keynote at WWDC 2014, Apple announced that DuckDuckGo would be included as an option for search on both iOS 8 and OS X Yosemite. On March 10, 2014 the Pale Moon web browser, starting with version 24.4.0, included DuckDuckGo as its default search engine as well as listed it on the browser's homepage. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「DuckDuckGo」の詳細全文を読む スポンサード リンク
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