Ranganathan's five laws of library science in the practical application of modern library are discussed.The new direction of library development under the background of the modern library is ex-plored.The process from traditional library to digital library and then to future smart library is expoun-ded.The five laws of library science are still the core of library science,which guide the practice and re-form of libraries.
Ranganathanfive laws of library sciencesmart library
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