National Science Digital Library (NSDL) aims at providing comprehensive S & T; information of students of science, engineering, and technology in the country. Begun as a Tenth Five Year Plan Network Project of the Council of Scientific and Industrial Research (CSIR), NDSL is the only one of its kind that provides curriculum-based content to address the information needs of the undergraduate students of science. The content creation and development for NDSL has gone through rigorous procedures to make available quality content for the students. Authored by eminent teachers and validated by renowned faculty in Indian universities and colleges, NDSL envisages bringing the finest content to the students. The discussion forum has been provided for interactions amongst NDSL users.