The term knowledge organization designates a field of study related to Library and Information Science. In this meaning, KO is about activities such as document description, indexing and classification performed in libraries, databases, archives etc. These activities are done by librarians, archivists, subject specialists as well as by computer algorithms. KO as a field of study is concerned with the nature and quality of such knowledge organizing processes (KOP) as well as the knowledge organizing systems used to organize documents, document representations and concepts. There exist different historical and theoretical approaches to and theories about organizing knowledge, which are related to different views of knowledge, cognition, language, and social organization. Library Information Service professionals have often concentrated on applying new technology and standards, and may not have seen their work as involving interpretation and analysis of meaning. This book has been designed to cater to the wishes of those involved in this subject. The comprehensive and insightful nature of the book should serve to make it a book worth reading for the reader.