A digital library is a library in which collections are stored in digital formats (as opposed to print, microform, or other media) and accessible by computers. The digital content may be stored locally, or accessed remotely via computer networks. A digital library is a type of information retrieval system
.A digital library has a number of advantages and problems not found in a traditional library. Some of the advantages are that there are no physical limits to information storage, materials can be accessed around the clock by multiple users, and they feature efficient information retrieval mechanisms. Some of the problems unique to a digital library include the need for periodical data migration due to constant and rapid technological advancement of information technology, as well as issues concerning copyright infringement. Nevertheless, library and information professional communities are pursuing a workable model of a digital library and a number of initiatives have been made both in the public and private sectors. For example, Google collaborated with a number of major academic libraries and made a large number of library holdings available to internet users under the Google Books Library Project