A library classification is system of coding, assorting and organizing documents, library materials or any information according to their subject and allocating a call number to that information resource. Bibliographic classification systems group entities together that are relevant to the same subject, typically arranged in a hierarchical tree structure. A different kind of classification system, called a faceted classification system, is also widely used which allows the assignment of multiple classifications to an object, enabling the classifications to be ordered in multiple ways. This book attempts to provide a detailed study of the impacts of information technology in library classification and also the latest developments that have been made in this area. Introducing the nature and purposes of library classification, the book discusses in detail the canons, principles and laws, which evaluate a scheme of classification. The book is ideally suited to students and researchers of library and information science and library professionals alike.