Mehdi Ahmadipour - Department of Education, Mazandaran
Mohammad Ghanbari - Department of Education, Mazandaran

Fuzzy logic was Suggested in 1965 by Iranian scientist professor Lotfizadeh in contrast with Aristotle’s twice value logic, accepts ambiguity as a part of a system and it employs in unknown and indefinite concepts. When a machine can’t realize quality concepts, ,Fuzzy logic transfers the way of human’s thought to technology. After nearly ten years when it created as library texts in 1975 it stated in essay named Finding a file in fuzzy situation in information and library world. With the exception of essay which published in Russian Language about practical application of Fuzzy sets for solving problems related to information organization named a scattered sets in ranking theory, nearly ,no longs all of published researches and essays about Fuzzy logic in the classification. . According to recorded information in Lisa information Bank, published about Fuzzy logic and information management it focused on retrieval and reserves information .It seems fuzzy logic helps us for solving some present problems in information management area.

Fuzzy logic, information management, retrieval and reserves ,library science