History 1,345,699 History and criticism 298,514 Histoire 54,990 Handbooks, manuals, etc 29,954 HISTORY 28,829 Housing 25,068 Historiography 24,234 Human rights 22,191 History, Military 17,368 Histoire et critique 17,197 Health and hygiene 15,747 History of doctrines 14,823 Hymns, English 13,469 HEALTH & FITNESS 12,221 Holocaust, Jewish (1939-1945) 12,172 Health 11,685 Health aspects 11,008 Hospitals 10,082 Homes and haunts 9,469 Human ecology 9,081 Horses 8,430 Historic sites 7,980 Historic buildings 7,767 Historical geography 7,345 Harbors 7,071 History, Modern 6,759 Hymns 6,559 Humorous stories 6,433 High schools 6,392 Human beings 6,221 Homosexuality 6,129 Historical 6,109 Hinduism 6,095 Health insurance 6,040 Historia 5,923 Hydrology 5,697 Handicraft 5,593 Heart 5,506 History, Ancient 5,500 Hebrew language 5,454 Hispanic Americans 5,346 Historians 5,270 Hydrographic surveying 5,258 History, Local 5,150 Hermeneutics 5,075 Hunting 5,069 Heat 4,988 Home economics 4,929 Health Policy 4,925 Humanities 4,892 History, Naval 4,709 Heroes 4,669 Human geography 4,550 High school students 4,392 Humanism 4,309 Human anatomy 4,244 Hazardous substances 4,208 Hazardous wastes 4,041 Human-animal relationships 3,970 History of Biblical events 3,915 Human-computer interaction 3,842 Holy Spirit 3,683 Hotels 3,487 Harpsichord music 3,466 Harbors and ports 3,429 Happiness 3,364 Human body 3,346 Housing policy 3,314 Health education 3,231 Hygiene 3,226 Hours of labor 3,197 Hardware 3,123 Heads of state 3,097 Human evolution 2,998 Historical fiction 2,860 Humor 2,821 Homicide 2,799 History & Surveys 2,797 Health care reform 2,776 Human behavior 2,759 Households 2,744 History, 20th Century 2,713 HEALTH & FITNESS / Diseases / General 2,710 Human physiology 2,652 Heraldry 2,585 Holidays 2,544 Hydrogeology 2,497 Health services administration 2,492 Homes 2,475 HIV infections 2,413 Health facilities 2,399 History of Medicine 2,394 Hydraulic engineering 2,370 Horror films 2,262 Horticulture 2,240 Health promotion 2,221 Health surveys 2,182 Human Rights 2,164 Hazardous waste sites 2,145 Holocaust survivors 2,129