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In the English speaking world the term "library science" appeared in the early 1930s, in the title of S. R. Ranganathan's The Five Laws of Library Science, published in 1931, and in the title of Lee Pierce Butler's 1933 book, An introduction to library science (University of Chicago Press). Butler's new approach advocated research using quantitative methods and ideas in the social sciences with the aim of using librarianship to address society's information needs. This research agenda went against the more procedure-based approach of "library economy," which was mostly confined to practical problems in the administration of libraries. While Ranganathan's approach was philosophical it was tied more to the day-to-day business of running a library. A reworking of Raganathan's laws was published in 1995 which removes the constant references to books. Michael Gorman's Five New Laws of Librarianship, encorporate knowledge and information in all their forms, allowing for digital inforamtion to be considered.

In more recent years, with the growth of digital technology, the field has been greatly influenced by information science concepts. Although a basic understanding is critical to both library research and practical work (for example in the use of online social networks by libraries), the area of information science has remained largely distinct both in training and in research interests.