Google is an American multinational technology company specializing in Internet-related services and products.
These include online advertising technologies, search, cloud computing, and software. Most of its profits are derived from AdWords, an online advertising service that places advertising near the list of search results.
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Bing (known previously as Live Search, Windows Live Search, and MSN Search) is a web search engine (advertised as a "decision engine") from Microsoft.
Bing was unveiled by Microsoft CEO Steve Ballmer on May 28, 2009, at the All Things Digital conference in San Diego, California, for release on June 1, 2009.
Notable changes include the listing of search suggestions while queries are entered and a list of related searches (called "Explore pane") based on semantic technology from Powerset, which Microsoft purchased in 2008.
On July 29, 2009, Microsoft and Yahoo! announced a deal in which Bing would power Yahoo! Search.
All Yahoo! Search global customers and partners made the transition by early 2012.
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Yahoo! is an American multinational technology company headquartered in Sunnyvale, California.
It is globally known for its Web portal, search engine Yahoo! Search, and related services, including Yahoo! Directory, Yahoo! Mail, Yahoo!
News, Yahoo! Finance, Yahoo! Groups, Yahoo! Answers, advertising, online mapping, video sharing, fantasy sports and its social media website. It is one of the most popular sites in the United States.
According to third-party web analytics providers, Alexa and SimilarWeb, Yahoo! is the highest-read news and media website, with over 7 billion readers per month, being the fourth most visited website globally, as of June 2015.
According to news sources, roughly 700 million people visit Yahoo websites every month. Yahoo itself claims it attracts "more than half a billion consumers every month in more than 30 languages."
Yahoo was founded by Jerry Yang and David Filo in January 1994 and was incorporated on March 1, 1995. Marissa Mayer, a former Google executive, serves as CEO and President of the company.
In January 2015, the company announced it planned to spin-off its stake in Alibaba Group in a separately listed company. In December 2015 it reversed this decision, opting instead to spin-off its internet business as a separate company.
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Facebook is an online social networking service headquartered in Menlo Park, California.
Its website was launched on February 4, 2004, by Mark Zuckerberg with his Harvard College roommates and fellow students Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes.
The founders had initially limited the website's membership to Harvard students, but later expanded it to colleges in the Boston area, the Ivy League, and Stanford University.
It gradually added support for students at various other universities and later to high-school students. Since 2006, anyone who is at least 13 years old was allowed to become a registered user of the website, though the age requirement may be higher depending on applicable local laws. Its name comes from the face book directories often given to American university students.
After registering to use the site, users can create a user profile, add other users as "friends", exchange messages, post status updates and photos, share videos and receive notifications when others update their profiles.
Additionally, users may join common-interest user groups, organized by workplace, school or college, or other characteristics, and categorize their friends into lists such as "People From Work" or "Close Friends".
Facebook had over 1.18 billion monthly active users as of August 2015. Because of the large volume of data users submit to the service, Facebook has come under scrutiny for their privacy policies.
Facebook, Inc. held its initial public offering in February 2012 and began selling stock to the public three months later, reaching an original peak market capitalization of $104 billion. On July 13, 2015, Facebook became the fastest company in the Standard & Poor's 500 Index to reach a market cap of $250 billion.
Following its Q3 earnings call in 2015, Facebook's market cap soared past $300 billion.
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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.
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.
On 10 November 2014, Mozilla added DuckDuckGo as a search option to Firefox 33.1.
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Twitter is an online social networking service that enables users to send and read short 140-character messages called "tweets".
Registered users can read and post tweets, but those who are unregistered can only read them.
Users access Twitter through the website interface SMS or mobile device app.
Twitter Inc. is based in San Francisco and has more than 25 offices around the world. Twitter was created in March 2006 by Jack Dorsey, Evan Williams, Biz Stone, and Noah Glass and launched in July 2006.
The service rapidly gained worldwide popularity, with more than 100 million users posting 340 million tweets a day in 2012.
The service also handled 1.6 billion search queries per day.
In 2013, Twitter was one of the ten most-visited websites and has been described as "the SMS of the Internet".
As of May 2015, Twitter has more than 500 million users, out of which more than 302 million are active.
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Yandex is a Russian Internet company which operates the largest search engine in Russia with about 60% market share in that country.
It also develops a number of Internet-based services and products. Yandex ranked as the 4th largest search engine worldwide, based on information from Comscore.com, with more than 150 million searches per day as of April 2012, and more than 50.5 million visitors (all company's services) daily as of February 2013. The company's mission is to provide answers to any questions users have or think about (explicit or implicit).
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Pinterest is a web and mobile application company, which operates an eponymous photo sharing website. Registration is required for use. The site was founded by Ben Silbermann, Paul Sciarra and Evan Sharp. It is managed by Cold Brew Labs and funded by a small group of entrepreneurs and investors.
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Baidu is a Chinese web services company headquartered at the Baidu Campus in Beijing's Haidian District. Baidu offers many services, including a Chinese language-search engine for websites, audio files and images.
Baidu offers 57 search and community services including Baidu Baike (an online, collaboratively-built encyclopedia) and a searchable, keyword-based discussion forum.
Baidu was established in 2000 by Robin Li and Eric Xu.
Both of the co-founders are Chinese nationals who studied and worked overseas before returning to China. In March 2015, Baidu ranked 4th overall in the Alexa Internet rankings.
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Oscobo was founded on the belief that "personal data should remain just that -- personal", Oscobo is a UK-based company that says it won't store any data about its users, let alone share it with anyone else.
With the controversy surrounding the snooper's charter, it makes sense that the privacy-focused search engine should start life in the UK, but there are plans to expand further afield to provide tailored results for people around the world.
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