SDNP virtual library (http://www.sdnbd.org/library) is providing online access to the catalogue of a group of Bangladeshi libraries those use Computerized Development System/Integrated Set of Information Systems well known as CDS/ISIS (an advanced non-numerical information storage and retrieval software developed and distributed by UNESCO to the non profit organization of developing countries at free of cost) in their library. Although some other organizations tried to establish virtual library in Bangladesh and invested lots of money but no one got the ultimate success like SDNP virtual library.