It has been man’s continual quest to be able to access all the records of human intellectual appeared anywhere, which might be of interest to him. Libraries are always being social institutions. They offer public access to information and knowledge representing diverse source and view point. But access to public knowledge, in traditional libraries, was limited to those who could travel to physical site of that library.

Access to library collection for remote users has long been a challenge for librarians. For centuries, they have managed warehouse of documents by acquiring, cataloguing and classifying books, journals and other materials and circulating them to their clientele. But computer and communication technologies have improved the new breed of information professionals to select, organize, retrieve and transfer digital content effectively and efficiently to the users Advancement in information and communication technologies (ICTs) has changed the concept of library as a physical artifact to digital library as a library without walls.

The terms, electronic library, digital library and virtual library have been used interchangeably and now widely accepted as a description of the use of digital technology by libraries to acquire, store, conserve and make available their content to remote users. In a broad sense, a digital library may be treated as an organized and managed collection of highly quality information content in a variety of media (text, still image, moving image, sound but all in digital forms, accessible over different electronic networks The concept of digital library is routed in the age-old dream of creating a virtual library. The main component of a virtual library is a vast, ideally universal collection of information and instantaneous access to that information wherever it physically resides but digital library is different form virtual library because of its physical identification in some aspects.

Digital libraries, like traditional ones, select, acquire, catalogue, make available, and preserve collections. A digital library contains digital representation of the objects found in it, and will be accessible via Internet, though not necessarily to everyone. But the idea of digitization is perhaps the only characteristic of a digital library on which there is universal agreement. The common characteristics in the various definitions of digital library, identified by Association of Research are as follows:

Contents in a digital library are organized and managed for the purpose of immediate access to the target audience. How contents are developed and managed, is a critical issue to the long term success of digital library services, especially when technical resources are limited. Content management includes the following key functions