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Information retrieval (IR) in computing and information science is the task of identifying and retrieving information system resources that are relevant to an information need.
This is the Antikythera mechanism, which is considered the first mechanical analog computer, dating back to the first century BC.. Based on the storage and processing technologies employed, it is possible to distinguish four distinct phases of IT development: pre-mechanical (3000 BC – 1450 AD), mechanical (1450 – 1840), electromechanical (1840 – 1940), and electronic (1940 to present).
Information is an abstract concept that refers to something which has the power to inform.At the most fundamental level, it pertains to the interpretation (perhaps formally) of that which may be sensed, or their abstractions.
Some engines suggest queries when the user is typing in the search box.. A search engine is a software system that provides hyperlinks to web pages and other relevant information on the Web in response to a user's query.
This page in a nutshell: Wikipedia requires inline citations for any material challenged or likely to be challenged, and for all quotations. If you are new to editing and just need a general overview of how sources work, please visit the referencing for beginners help page.
In journalism, a source is a person, publication, or knowledge of other record or document that gives timely information.Outside journalism, sources are sometimes known as "news sources".
A web page from Wikipedia displayed in Google Chrome. The World Wide Web (WWW or simply the Web) is an information system that enables content sharing over the Internet through user-friendly ways meant to appeal to users beyond IT specialists and hobbyists. [1]
Historical document; Historical source; Source (intelligence) or sub source, typically a confidential provider of non open-source intelligence Source (journalism), a person, publication, publishing institute or other record or document that gives information