Synopsis The digital or virtual libraries have brought the revolutionary changes in the entire concept of library organization, management and operations. To peep into it, library and information science professionals, need to be get ready to face the challenges emerging due to the adoption of newer technologies. In this volume an attempt has been made to synthesize all aspects of Digital Libraries and to put them in the systematic order at one place to understand the conceptual phenomena and to render the better services. This book deals not only with the theoretical aspects of Digital Libraries but there are also some case studies which show the path to go ahead. Antrivirus is also an important factor in forming the Digital Library. This aspect has also been given the due importance and a complete chapter has been devoted to this aspect.