All those candidates who are in search for the lecture on DDC (Dewey Decimal Classification), This practice session cover BLIE-227 of IGNOU, this help students to understand the different component of Dewey Decimal Classification Practice and how number are build through DDC classification System. In this lecture the IGNOU BLIS study material has been used. This video will be use for academic purpose only. This lecture is sole copyright of Dr. Projes Roy.