600 - Technology 44,942 330 - Economics 10,020 900 - History & geography 7,184 620 - Engineering & allied operations 6,830 621 - Applied physics 6,623 000 - Computer science, information & general works 6,541 more ... 610 - Medicine & health 6,169 005 - Computer programming, programs & data 6,071 700 - The arts; fine & decorative arts 6,056 300 - Social sciences 4,301 333 - Economics of land & energy 4,122 800 - Literature & rhetoric 3,786 500 - Natural sciences & mathematics 3,728 004 - Data processing & computer science 3,709 320 - Political science 3,217 658 - General management 3,147 363 - Other social problems & services 2,677 100 - Philosophy & psychology 2,632 530 - Physics 2,502 370 - Education 2,480 006 - Special computer methods 2,172 140 - Specific philosophical schools 2,128 380 - Commerce, communications & transportation 2,036 540 - Chemistry & allied sciences 1,805 580 - Plants (Botany) 1,664 331 - Labor economics 1,610 340 - Law 1,479 400 - Language 1,394 576 - Genetics & evolution 1,162 410 - Linguistics 1,140 374 - Adult education 1,102 200 - Religion 1,055 551 - Geology, hydrology & meteorology 1,021 745 - Decorative arts 981 301 - Sociology & anthropology 926 612 - Human physiology 819 381 - Commerce 814 581 - Specific topics in natural history 796 541 - Physical chemistry 762 630 - Agriculture & related technologies 735 304 - Factors affecting social behavior 734 720 - Architecture 713 629 - Other branches of engineering 647 384 - Communications; telecommunication 627 170 - Ethics 601 338 - Production 598 539 - Modern physics 559 616 - Diseases 500 414 - Phonology & phonetics 467 302 - Social interaction 451 615 - Pharmacology & therapeutics 440 780 - Music 421 571 - Physiology & related subjects 418 003 - Systems 387 830 - Literatures of Germanic languages 372 650 - Management & auxiliary services 371 770 - Photography, photographs & computer art 345 572 - Biochemistry 343 361 - Social problems & social welfare in general 340 670 - Manufacturing 316 332 - Financial economics 295 011 - Bibliographies 287 001 - Knowledge 261 537 - Electricity & electronics 236 794 - Indoor games of skill 236 297 - Islam, Babism & Bahai Faith 223 519 - Probabilities & applied mathematics 214 520 - Astronomy & allied sciences 214 547 - Organic chemistry 209 543 - Analytical chemistry 195 303 - Social processes 188 791 - Public performances 186 660 - Chemical engineering 177 546 - Inorganic chemistry 176 570 - Life sciences; biology 159 364 - Criminology 156 120 - Epistemology, causation & humankind 144 025 - Library operations 139 602 - Miscellany 129 510 - Mathematics 126 657 - Accounting 119 523 - Specific celestial bodies & phenomena 116 778 - Fields & kinds of photography 115 350 - Public administration & military science 111 550 - Earth sciences 111 296 - Judaism 102 158 - Applied psychology 100 515 - Analysis 99 617 - Surgery & related medical specialties 98 360 - Social problems & services; associations 96 579 - Microorganisms, fungi & algae 95 153 - Mental processes & intelligence 91 590 - Animals (Zoology) 91 690 - Buildings 89 538 - Magnetism 86 624 - Civil engineering 86 371 - Schools & their activities; special education 85 398 - Folklore 85 518 - Numerical analysis 85 336 - Public finance 84 see all ... less ...

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