Organization, or part of an organization, World Health Organization [WHO]se main aims are to build and maintain a collection and to facilitate the use of such information resources and facilities as are required to meet the informational, research, educational, cultural or recreational needs of its users; these are the basic requirements for a library and do not exclude any additional resources and services incidental to its main purpose (ISO, 2006). It includes any organized collection of books and periodicals in electronic or in printed form or of any other graphic or audio-visual materials (based on United Nations Educational, Scientific and Cultural Organization [UNESCO], 1970). It includes virtual libraries, digital catalogues.