“The requirements of information retrieval, of finding information whose location or very existence is a priori unknown.”

—  Calvin Mooers

Calvin Mooers (1947); cited in. Eugene Garfield (1997) "A Tribute To Calvin N. Mooers, A Pioneer Of Information Retrieval." The Scientist, Vol:11, #6, p. 9, March 17, 1997

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American computer scientist 1919–1994

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“Information retrieval consists of four main stages: Identifying the exact subject of the search; Locating this subject in a guide which refers the searcher to one or more documents; Locating the documents; Locating the required information in the documents.”

Douglas John Foskett (1918–2004)

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“Information retrieval is the name for the process or method whereby a prospective user of information is able to convert his need for information into an actual list of citations to documents in storage containing information useful to him. It is the finding or discovery process with respect to stored information. It is another, more general, name for the production of a demand bibliography. Information retrieval embraces the intellectual aspects of the description of information and its specification for search, and also whatever systems, technique, or machines that are employed to carry out the operation. Information retrieval is crucial to documentation and organization of knowledge.”

Calvin Mooers (1919–1994) American computer scientist

Calvin Mooers (1951) "Zatocoding applied to mechanical organization of knowledge." American Documentation, 2, p. 25; Cited in: Birger Hjørland (2006) " Information retrival (IR) http://www.iva.dk/bh/Core%20Concepts%20in%20LIS/articles%20a-z/information_retrieval.htm" on iva.dk.

“An information retrieval system will tend not to be used whenever it is more painful and troublesome for a customer to have information than for him not to have it… Where an information retrieval system tends not to be used, a more capable information retrieval system may tend to be used even less.”

Calvin Mooers (1919–1994) American computer scientist

Calvin Mooers (1959) Mooers' law: or, why some retrieval systems are used and others are not. p. 138

“The retrieval process begins when a lack of information shows itself in a human mind and the decision is taken to find out if this information has been discovered and published”

Douglas John Foskett (1918–2004)

Source: Classification and indexing in the social sciences (1963), p. 86; As cited in: Mei Hong (2006, p. 44)

“Four basic operations in the effective use of graphic records (documents), to store information and make it available, have been listed by Hyslop: A, recording information in documents; B, storing recorded information—documentary items; C, identifying items containing information relevant to a given problem, situation, or subject; D, providing the identified items from storage. Information storage and retrieval in the wide sense covers all these operations. In the narrow sense used in this paper, information retrieval means only C, identifying documentary items by subject.”

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“Varied views were put forward as to the content and priorities of information science, though there was general agreement that its central topics should be information organisation, dissemination and retrieval.”

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Source: A Long Search for Information (2004), p. 25.

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“The problem of directing a user to stored information, some of which may be unknown to him, is the problem of "information retrieval"… In information retrieval, the addressee or receiver rather than the sender is the active party. Other differences are that communication is temporal from one epoch to a later epoch in time, though possibly at the same point in space; communication is in all cases unidirectional; the sender cannot know the particular message that will be of later use to the receiver and must send all possible messages; the message is digitally representable; a "channel" is the physical document left in storage which contains the message; and there is no channel noise because all messages are presumed to be completely accessible to the receiver. The technical goal is finding in minimum time those messages of interest to the receiver, where the receiver has available a selective device with a finite digital scanning rate.”

Calvin Mooers (1919–1994) American computer scientist

Calvin Mooers (1950). " Information retrieval viewed as temporal signaling http://www.mathunion.org/ICM/ICM1950.1/Main/icm1950.1.0565.0576.ocr.pdf#page=8". Proceedings of the International Congress of Mathematicians. Vol. 1, S.572-573

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Andrei Sakharov (1921–1989) Soviet nuclear physicist and human rights activist

Nobel Peace Prize Speech (1975)

“[Task uncertainty is] the difference between the amount of information required to perform the task and the amount of information already possessed by the organisation.”

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