Mankind throughout its development has always had the ambition to build libraries able to store, organize and disseminate all the information and knowledge produced by man over time. In this context, the digital library appears as an efficient mechanism to supply this need of assisted information and communication technologies current during its development. The digital library is a technological and social phenomenon of the 1990s, which linked to the development and popularization of the Internet has become more visible in recent years. This article is part of an exploratory research based on a literature review in order to discuss and understand the issues of digital library in order to highlight the major problem that haunts this kind of library with respect to its conceptualization and possible definitions, as that there is an ambiguity about the term digital library, is often confused or associated with electronic library or virtual library.

Keywords: Digital Library. Definitions. Concepts. Information Technology and Communication.