Book excerpt: The information technology explosion and its applications in every aspect of life have changed the entire scenario of the present world. The IT revolution and information explosion has led to the emergence of electronic information era. Advanced in internet technologies have made it seemingly possible and easy to create digital collections, repositories, archives and libraries. However, supporting diverse information usages that facilitate interaction beyond searching and browsing is in the early stages. Interactive digital libraries and digital archives are still evolving. The digital preservation techniques have brought revolutionary changes in the organization and management of libraries and archives. Digital Library improves the organizational efficiencies by leveraging data processing, data storage and data communication technologies. Existing network facilities can be utilized to achieve great savings in labour costs and the reduction of paper storage and handling facilities. This book has written for use in Library and Information Science professionals and students. It will be useful of all levels of Library and Information Science Professionals and Students. It will also helpful for those preparing for organizing Digital Library in their own premises. This book aims to delineate for the readers the principles, methods and techniques which are involved in the digital library management and information development.