In digital library, the digital content may be stored and accessed locally and distantly through computer networks. Institutional repositories (IR) archives and digital library are needs of present scenario. Library users need the information which is preserved for research and academic purpose. New technologies develop and influenced the betterment of academic libraries and users. Digitalization has become an integrated part and routine work of the libraries and library professional. It gives development of library activities, standardization, communication facilities, housekeeping operations to growing the variety of information needs of the end users. Digital library can be considered as a modern type of information retrieval systems. It is considered virtual because the collections are stored in digital formats and accessible over computers or mobiles anytime anywhere. Such features of library defined and interchangeably used as ‘virtual library’, ‘electronic library’, ‘institutional repository’, ‘library without walls’, ‘digital library’ etc. The most appropriate and accepted word to such libraries is ‘Digital Library’. It makes definition of digital library more confusing. Information technology has changed the way of library services, such as identify, processed, procured, retrievals, dissemination to its users. Digital technology has a produced intellect of necessity amongst the users and professionals as well. It has transit information sources systems and services from paper works to electronic services, information explosion, searching problem in traditional libraries, solve the space problem, reduce the cost of technology, improve the quality of information and save the times of the users. This book covers some of these challenges and opportunities in context to academic libraries. Digital library is an innovative technology to develop the learning and new required skills for professionals to cope with digital libraries.