The online database of the digital objects that includes videos, audios, texts, still images and other digital media formats is referred to as a digital library. The two major types of digital libraries are institutional repositories and digital archives. Institutional repositories include the books, theses, papers and other works of an institution that can be digitized. The software of institutional library is specialized in searching, organizing and archiving the content of a library. The digital archives often keep the context in which their records have been created. The topics included in this book on digital libraries are of utmost significance and bound to provide incredible insights to readers. The concepts covered herein deal with the core theories and practices of this field. As this field is emerging at a rapid pace, the contents of this book will help the readers understand the modern concepts and applications of the subject.