We are the largest manufacturer and supplier of UDC: A Manual for Classification Practical and Information Resources Book in Delhi, India. Librarianship has been in existence ever since the progression of the human society and developed with the growth of institutions throughout the world. The primary objective of librarianship aims towards the selection, acquisition, process, evaluation, storage and dissemination of selective knowledge contained in books, periodicals, magazines, encyclopedia, dictionaries, directories, computer files, CDs, DVD, Pen drives and the Internet. Essential resources must be properly organized in libraries for the purpose of effective use and retrieval. Hence, the role of library classification came into the existence. Library classification is a system intended for organizing all forms of literature in a systematic order using the globally accepted notational system. The library classification in spite of far-reaching alterations in the present day scenario remains the focal point in libraries and teaching schools throughout the world for organizing the thought content and retrieval of the information recorded in documentary and non documentary forms in the most mechanical way. UDC or Universal Decimal Classification is the most popular and widely used classification scheme not only in India rather throughout the world, particularly in the libraries of science and technology.