Book 58,075 Conference Proceeding 7,525 Electronic 3,138 Journal 2,618 Serial 2,350 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 64,199 D - World History 1

SpringerLink (Online service) 1,955 ebrary, Inc 810 SIGGRAPH 584 Institute of Electrical and Electronics Engineers 543 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 147 De Gruyter 144 Rand Corporation 142 ACM Digital Library 139 United States Patent and Trademark Office 135 NetLibrary, Inc 132 United States General Accounting Office 124 World's Fairs and Expositions Collection (University of Pennsylvania) 117 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 49,668 German 3,698 French 2,926 Russian 2,285 Chinese 1,895 Spanish 1,368 Japanese 1,011 Italian 794 Portuguese 369 Polish 276 Korean 262 Indonesian 236 Dutch 216 Swedish 158 Czech 156 Arabic 150 Ukrainian 94 Hebrew 91 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 7,351 Electronic books 6,376 Conference papers and proceedings 5,003 Periodicals 3,618 History 2,994 Dictionaries 1,523 Exhibitions 1,111 Handbooks, manuals, etc 1,076 Directories 951 Exhibition catalogs 797 Handbooks and manuals 707 Biography 658 Pictorial works 575 Catalogs 449 Biographies 438 Electronic journals 420 Congrès 359 Case studies 308 Guidebooks 290 Bibliography 262 Statistics 255 Technical reports 239 Sources 225 Juvenile literature 224 World's fairs 176 Early works to 1800 169 Bibliographies 136 Indexes 134 Academic theses 132 Terminology 128 see all ...

20th century 756 19th century 527 1900-1999 250 1800-1899 147 21st century 143 1945- 92 1800-1999 86 18th century 78 1900 - 1999 77 Since 1945 73 Early works to 1800 64 1856-1915 61 Qing 55 To 1500 54 20e siècle 48 2000-2099 41 1800 - 1999 38 1800 - 1899 34 Geschichte 34 19e siècle 31 20e siècle 27 17th century 24 Ming 24 1846-1914 23 1878-1972 23 1868-1924 22 Tong dai 21 1700-1799 20 1452-1519 19 1858-1935 18 see all ...

United States 4,571 China 979 Japan 868 Great Britain 820 Germany 734 Soviet Union 718 Massachusetts 632 France 590 Developing countries 563 Europe 522 Cambridge 490 India 357 Canada 347 Italy 333 England 269 California 235 Russia (Federation) 229 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 147 Paris 147 see all ...