The study of the principles and practices of library administration WordNet 3.0 & Open English WordNet

Library science is an interdisciplinary or multidisciplinary field that applies the practices, perspectives, and tools of management, information technology, education, and other areas to libraries; the collection, organization, preservation, and dissemination of information resources; and the political economy of information. Wikipedia

Field of study on the application of practices, methods, technologies, tools of management, education, training, perspectives, and related areas, to the organized collection and the systematic classification of information in libraries Wikidata

An interdisciplinary science incorporating the humanities, law and applied science to study topics related to libraries, the collection, organization, preservation and dissemination of information resources, and the political economy of information. Wiktionary

Interdisciplinary science. Wiktionary (translation)