This book, which starts with the relevance of Dr. S.R. Ranganathan's work in the digital era, looks at how to build a digital library, touching on various aspects of modern librarianship such as computer applications, electronic contents, book acquisition, knowledge management, eLearning in library science, etc. This book is a complete compendium for any librarian who wishes to learn about S.R. Ranganathan's work and the role of automation in libraries.