Book 58,112 Conference Proceeding 7,532 Electronic 3,139 Journal 2,617 Serial 2,352 Government Document 2,076 Thesis 883 Unknown 642 Audio 80 Manuscript 63 Reference Material 53 Photo 16 Book Chapter 15 Newspaper 8 Map 7 Kit 6 Physical Object 6 Musical Score 4 see all ...

T - Technology 64,243 D - World History 1

SpringerLink (Online service) 1,964 ebrary, Inc 810 SIGGRAPH 584 Institute of Electrical and Electronics Engineers 550 IEEE Xplore (Online service) 528 ProQuest (Firm) 474 Adam Matthew Digital (Firm) 458 Massachusetts Institute of Technology 417 IEEE Computer Society 255 United States Patent Office 199 Organisation for Economic Co-operation and Development 159 Association for Computing Machinery 151 National Science Foundation (U.S.) 150 European Association for Computer Graphics 148 De Gruyter 144 Rand Corporation 142 ACM Digital Library 139 United States Patent and Trademark Office 135 United States General Accounting Office 124 World's Fairs and Expositions Collection (University of Pennsylvania) 117 NetLibrary, Inc 103 American Society for Engineering Education 98 Sloan School of Management 92 Edward Potts Cheyney Memorial Fund 88 Nihon Hōsō Shuppan Kyōkai 86 World's Columbian Exposition 85 International Labour Office 81 Society of Photo-optical Instrumentation Engineers 79 Edgar Fahs Smith Memorial Collection (University of Pennsylvania) 78 United States Congress. House. Committee on Patents 78 see all ...

English 49,695 German 3,702 French 2,930 Russian 2,289 Chinese 1,897 Spanish 1,368 Japanese 1,011 Italian 795 Portuguese 369 Polish 277 Korean 262 Indonesian 237 Dutch 218 Swedish 158 Czech 156 Arabic 151 Ukrainian 95 Hebrew 92 Multiple 91 Hungarian 83 Vietnamese 82 Danish 76 Turkish 72 Greek 65 Bulgarian 57 Romanian 57 Thai 55 Croatian 49 Norwegian 46 Latin 40 see all ...

Congresses 7,360 Electronic books 6,284 Conference papers and proceedings 5,008 Periodicals 3,618 History 2,995 Dictionaries 1,523 Exhibitions 1,110 Handbooks, manuals, etc 1,074 Directories 950 Exhibition catalogs 796 Handbooks and manuals 708 Biography 657 Pictorial works 575 Catalogs 448 Biographies 438 Electronic journals 418 Congrès 361 Case studies 308 Guidebooks 290 Bibliography 261 Statistics 255 Technical reports 239 Sources 225 Juvenile literature 222 World's fairs 176 Early works to 1800 170 Périodiques 137 Bibliographies 135 Indexes 134 Academic theses 132 see all ...

20th century 756 19th century 528 1900-1999 250 1800-1899 149 21st century 142 1945- 92 1800-1999 86 18th century 79 1900 - 1999 77 Since 1945 73 Early works to 1800 64 1856-1915 61 Qing 55 To 1500 54 20e siècle 49 2000-2099 41 1800 - 1999 38 1800 - 1899 34 Geschichte 34 19e siècle 31 20e siècle 27 17th century 24 1846-1914 24 Ming 24 1878-1972 23 1868-1924 22 Tong dai 21 1700-1799 20 1452-1519 19 1900-2099 19 see all ...

United States 4,569 China 980 Japan 868 Great Britain 825 Germany 734 Soviet Union 718 Massachusetts 632 France 591 Developing countries 562 Europe 522 Cambridge 490 India 357 Canada 347 Italy 333 England 270 California 235 Russia (Federation) 230 New York (State) 224 Nigeria 205 Illinois 198 Brazil 190 Indonesia 185 Spain 176 European Union countries 169 Chicago 168 Australia 166 Mexico 150 Korea (South) 149 Africa 148 Paris 147 see all ...