An e-Resources or electronic resource is defined as a resource which requires computer access or any electronic product that delivers a collection of data, be it text referring to full textbases, electronic journals, image collections, other multimedia products. These may be delivered on CD ROM, via the internet, and so on. Over the past few years, many techniques and related standards have been developed which allow documents to be created and distributed in electronic form. Hence to cope with the present situation, librarians are shifting towards new media, namely electronic resources for their collection developments that the documents of users are better fulfilled. The e-resources on magnetic and optical media have a vast impact on the collections of University libraries. These are more useful due to inherent capabilities for manipulation and searching, providing information access is cheaper to acquiring information resources, savings in storage and maintenance, etc. and sometimes the electronic form is the only alternative.
E-resources (electronic resource) is that Information (usually a file) which can be stored in the form Electrical signal usually, but not necessary on a computer.