Library classification schemes 71 Literature 69 Decimal Classification 63 Literature Hindi 54 History 39 Classification 21 International law 19 DDC 18 Deway decimal classification 18 Heridity 18 Dewey Decimal Classification 14 Human rights 14 LAW / International 14 Library Science 14 Politics and government 14 Religion 14 Law and legislation 13 Philosophy 13 Classification, Dewey decimal 12 Intellectual property 11 Dissertations, Academic (Ph.D) 10 History and criticism 10 India 10 Climatic changes 9 DNA 9 Mathematics 9 Poetry Hindi 9 Classification, Dewey Decimal 8 Genetics 8 Intellectual property (International law) 8