CAIRS (Computer Assisted Information Retrieval System) - traducción al
![German entry]], original source [http://www.logos-verlag.de/cgi-bin/engbuchmid?isbn=0514&lng=eng&id= Dominik Kuropka]).](https://commons.wikimedia.org/wiki/Special:FilePath/Information-Retrieval-Models.png?width=200 "German entry]], original source [http://www.logos-verlag.de/cgi-bin/engbuchmid?isbn=0514&lng=eng&id= Dominik Kuropka]).")
![sectors]].](https://commons.wikimedia.org/wiki/Special:FilePath/Dartboard unlabeled.svg?width=200 "sectors]].")
![faces]].](https://commons.wikimedia.org/wiki/Special:FilePath/Icosahedron.svg?width=200 "faces]].")
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![Sir William Thomson]]'s third tide-predicting machine design, 1879–81](https://commons.wikimedia.org/wiki/Special:FilePath/099-tpm3-sk.jpg?width=200 "Sir William Thomson]]'s third tide-predicting machine design, 1879–81")
![算盘}}). The number represented on this [[abacus]] is 6,302,715,408.](https://commons.wikimedia.org/wiki/Special:FilePath/Abacus 6.png?width=200 "算盘}}). The number represented on this [[abacus]] is 6,302,715,408.")
![[[Cray]] designed many supercomputers that used multiprocessing heavily.](https://commons.wikimedia.org/wiki/Special:FilePath/Cray 2 Arts et Metiers dsc03940.jpg?width=200 "[[Cray]] designed many supercomputers that used multiprocessing heavily.")
![Babbage's]] [[Difference engine]]](https://commons.wikimedia.org/wiki/Special:FilePath/Difference engine plate 1853.jpg?width=200 "Babbage's]] [[Difference engine]]")
![[[ENIAC]] was the first electronic, Turing-complete device, and performed ballistics trajectory calculations for the [[United States Army]].](https://commons.wikimedia.org/wiki/Special:FilePath/Eniac.jpg?width=200 "[[ENIAC]] was the first electronic, Turing-complete device, and performed ballistics trajectory calculations for the [[United States Army]].")
![The actual first computer bug, a moth found trapped on a relay of the [[Harvard Mark II]] computer](https://commons.wikimedia.org/wiki/Special:FilePath/First Computer Bug, 1945.jpg?width=200 "The actual first computer bug, a moth found trapped on a relay of the [[Harvard Mark II]] computer")
![A 1970s [[punched card]] containing one line from a [[Fortran]] program. The card reads: "Z(1) = Y + W(1)" and is labeled "PROJ039" for identification purposes.](https://commons.wikimedia.org/wiki/Special:FilePath/FortranCardPROJ039.agr.jpg?width=200 "A 1970s [[punched card]] containing one line from a [[Fortran]] program. The card reads: \"Z(1) = Y + W(1)\" and is labeled \"PROJ039\" for identification purposes.")
![[[Hard disk drive]]s are common storage devices used with computers.](https://commons.wikimedia.org/wiki/Special:FilePath/HDDspin.JPG?width=200 "[[Hard disk drive]]s are common storage devices used with computers.")
![routes]] on the Internet](https://commons.wikimedia.org/wiki/Special:FilePath/Internet map 1024.jpg?width=200 "routes]] on the Internet")
.jpg?width=200 "website=www.computerhope.com}}</ref>")
![gate]] (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (pink).](https://commons.wikimedia.org/wiki/Special:FilePath/MOSFET Structure.png?width=200 "gate]] (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (pink).")
![memory cells]]).](https://commons.wikimedia.org/wiki/Special:FilePath/Magnetic core.jpg?width=200 "memory cells]]).")
![Diagram showing how a particular [[MIPS architecture]] instruction would be decoded by the control system](https://commons.wikimedia.org/wiki/Special:FilePath/Mips32 addi.svg?width=200 "Diagram showing how a particular [[MIPS architecture]] instruction would be decoded by the control system")
![The [[Antikythera mechanism]], dating back to [[ancient Greece]] circa 150–100 BC, is an early [[analog computing]] device.](https://commons.wikimedia.org/wiki/Special:FilePath/NAMA Machine d'Anticythère 1.jpg?width=200 "The [[Antikythera mechanism]], dating back to [[ancient Greece]] circa 150–100 BC, is an early [[analog computing]] device.")
![The [[Ishango bone]], a [[bone tool]] dating back to [[prehistoric Africa]]](https://commons.wikimedia.org/wiki/Special:FilePath/Os d'Ishango IRSNB.JPG?width=200 "The [[Ishango bone]], a [[bone tool]] dating back to [[prehistoric Africa]]")
![Museum of Science and Industry]] in Manchester, England](https://commons.wikimedia.org/wiki/Special:FilePath/SSEM Manchester museum.jpg?width=200 "Museum of Science and Industry]] in Manchester, England")
![A section of the reconstructed [[Manchester Baby]], the first electronic [[stored-program computer]]](https://commons.wikimedia.org/wiki/Special:FilePath/SSEM Manchester museum close up.jpg?width=200 "A section of the reconstructed [[Manchester Baby]], the first electronic [[stored-program computer]]")
![A [[slide rule]]](https://commons.wikimedia.org/wiki/Special:FilePath/Sliderule 2005.png?width=200 "A [[slide rule]]")
![[[Bipolar junction transistor]] (BJT)](https://commons.wikimedia.org/wiki/Special:FilePath/Transistor-die-KSY34.jpg?width=200 "[[Bipolar junction transistor]] (BJT)")
![Z3]], the first fully automatic, digital (electromechanical) computer](https://commons.wikimedia.org/wiki/Special:FilePath/Z3 Deutsches Museum.JPG?width=200 "Z3]], the first fully automatic, digital (electromechanical) computer")
Definición
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Wikipedia
Information retrieval (IR) in computing and information science is the process of obtaining information system resources that are relevant to an information need from a collection of those resources. Searches can be based on full-text or other content-based indexing. Information retrieval is the science of searching for information in a document, searching for documents themselves, and also searching for the metadata that describes data, and for databases of texts, images or sounds.
Automated information retrieval systems are used to reduce what has been called information overload. An IR system is a software system that provides access to books, journals and other documents; stores and manages those documents. Web search engines are the most visible IR applications.
