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DuckDuckGo is an American software company with a focus on online privacy. [6] The flagship product is a search engine that has been praised by privacy advocates. [7] [8] Subsequent products include browser extensions [9] and a custom DuckDuckGo web browser.
Qwant also became the default search engine for the Brave browser in France and Germany. [37], and the default search engine for the French Ministry of armies' computer stations on October 2, 2018. [38] On January 30, 2019, the aeronautical company Safran standardized the use of Qwant as a search engine within the company. [39]
A web portal is a specially designed website that brings information from diverse sources, like emails, online forums and search engines, together in a uniform way.Usually, each information source gets its dedicated area on the page for displaying information (a portlet); often, the user can configure which ones to display.
Other types of search engines do not store an index. Crawler, or spider type search engines (a.k.a. real-time search engines) may collect and assess items at the time of the search query, dynamically considering additional items based on the contents of a starting item (known as a seed, or seed URL in the case of an Internet crawler).
Wide Area Information Server (WAIS) is a client–server text searching system that uses the ANSI Standard Z39.50 Information Retrieval Service Definition and Protocol Specifications for Library Applications" (Z39.50:1988) to search index databases on remote computers.
Today, this algorithm is a part of major web search engines like Yahoo! and Google. One of the most important factors that help web search engine determine the quality of a web page when returning results are backlinks. Search engines take a number and quality of backlinks into consideration when assigning a place to a certain web page in SERPs.
In August 2009, Google invited web developers to test a new search architecture, codenamed "Caffeine", and give their feedback. The new architecture provided no visual differences in the user interface, but added significant speed improvements and a new "under-the-hood" indexing infrastructure.