Book 601,832 Conference Proceeding 344,216 Government Document 8,755 Serial 8,028 Journal 2,210 Electronic 2,196 Audio 375 Unknown 285 Manuscript 226 Thesis 136 Book Chapter 116 Kit 102 Article 75 Reference Material 14 Musical Score 8 Map 4 Newspaper 4 Photo 4 see all ...

Q - Science 106,185 T - Technology 89,657 H - Social Science 79,345 P - Language and Literature 55,462 D - World History 48,240 B - Philosophy, Psychology, Religion 38,237 R - Medicine 26,092 K - Law 22,141 J - Political Science 16,959 N - Fine Arts 14,974 G - Geography, Anthropology, Recreation 14,530 L - Education 11,061 S - Agriculture 9,595 M - Music 6,925 Z - Library Science 6,574 F - General American History 5,884 C - Historical Sciences 5,431 E - United States History 3,166 A - General Works 3,117 U - Military Science 2,898 V - Naval Science 1,192 see all ...

IEEE Xplore (Online service) 13,781 Society of Photo-optical Instrumentation Engineers 9,900 Institute of Electrical and Electronics Engineers 8,497 IEEE Computer Society 4,162 Society of Photo-Optical Instrumentation Engineers 3,782 North Atlantic Treaty Organization Scientific Affairs Division 2,174 Association for Computing Machinery 2,152 ACM Digital Library 2,025 American Society for Testing and Materials 1,645 George Clapp Vaillant Book Fund 1,411 SPIE (Society) 1,302 Unesco 1,098 National Science Foundation (U.S.) 1,097 International Labour Office 1,071 IEEE Communications Society 1,058 De Gruyter 1,042 Society of Automotive Engineers 1,038 IEEE Electron Devices Society 1,029 United States National Aeronautics and Space Administration 995 American Society of Mechanical Engineers Winter Annual Meeting 951 Organisation for Economic Co-operation and Development 944 Food and Agriculture Organization of the United Nations 905 American Chemical Society Meeting 897 Centre national de la recherche scientifique (France) 757 New York Academy of Sciences 756 American Society of Mechanical Engineers 734 Alumni and Friends Memorial Book Fund 732 Materials Research Society Fall Meeting 724 International Atomic Energy Agency 705 World Health Organization 702 see all ...

English 431,803 French 68,144 German 61,551 Italian 34,746 Spanish 33,488 Russian 23,688 Chinese 7,901 Arabic 7,018 Portuguese 6,594 Polish 4,529 Indonesian 4,014 Turkish 3,500 Japanese 2,809 Ukrainian 1,952 Hebrew 1,851 Multiple 1,660 Czech 1,654 Greek 1,597 Dutch 1,465 Korean 1,375 Hindi 1,203 Catalan 1,135 Latin 1,031 Croatian 1,024 Persian 966 Vietnamese 966 Swedish 824 Thai 824 Slovak 787 Bulgarian 772 see all ...

20th century 20,034 1900-1999 11,654 19th century 6,855 21st century 5,061 1900 - 1999 4,154 18th century 3,818 To 1500 3,592 1945- 2,851 2000-2099 2,595 1800-1899 2,532 17th century 2,522 16th century 2,391 Since 1945 1,834 20e siècle 1,735 1800-1999 1,721 1700-1799 1,583 1991- 1,519 1939-1945 1,483 Since 1991 1,263 1989- 1,233 Geschichte 1,065 Middle Ages, 600-1500 1,028 1800 - 1899 942 1900-2099 917 Since 1989 836 1500-1599 808 1600-1699 733 1960- 722 2000 - 2099 646 Medieval, 500-1500 644 see all ...

United States 29,298 Europe 22,288 Italy 14,162 Germany 13,449 France 10,808 India 9,925 Russia (Federation) 8,693 China 7,338 Latin America 7,048 Spain 6,074 Asia 5,456 Soviet Union 4,739 Africa 4,703 Great Britain 4,340 Indonesia 4,262 Developing countries 3,932 Canada 3,573 Turkey 3,533 Japan 3,342 European Union countries 3,292 Poland 3,291 Mexico 3,282 Middle East 3,108 Russia 3,032 Rome 2,867 Greece 2,845 Europe, Eastern 2,829 Brazil 2,823 Mediterranean Region 2,311 Southeast Asia 2,307 see all ...