Preservation of library materials has been a problem since the establishment of the first library in antiquity. Deterioration and decay are part of the inherent factors affecting all organic materials. In order to preserve the knowledge of past generations for the use of future students and scholars, steps can be taken to slow down these natural processes. Digital libraries have various methods and technologies to preserve and use the book, namely, acquisition, classification, cataloguing, accessioning, etc. These are treated as library technical activities and once the book is processed through library it is then ready for circulation to users. Today, global libraries use network security, policies to ensure the implementation of their security model, in maintaing network security, protection of information loss, alteration, unavailability and the safeguarding of the oganisations’ network from internal and external threats. About The Author:- Prof. Ramesh Chandra, was born in a family of academician and freedom fighters on July 1st. 1957 in village Bijwara, District Meerut of Uttar Pradesh. He started his research career at University of Delhi and then went to the New York Hospital-Cornell University Medical Center, as well as at the School of Medicine, State University of New York at Stony Brook as a faculty member and then went to Harvard University Medical School-Massachusetts General Hospital joined at MIT, Cambridge, USA. On his return to India he joined the faculty at the University of Delhi, where he is currently a Professor of Chemistry and Director of Dr. BR Ambedkar Centre for Biomedical Research: in addition to his present assignment as Vice-Chancellor of Bundelkhand University, Jhansi (UP). He was appointed Professor (Research Scientist) by the UGC at the young age of 35 years. He is a creator, performer and builder of institutions of higher learning. He has established Dr. BR Ambedkar Centre of Biomedical Research at University of Delhi, when he was ju

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