600 - Technology 9,501 629 - Other branches of engineering 2,658 610 - Medicine & health 1,665 620 - Engineering & allied operations 1,544 003 - Systems 1,391 330 - Economics 1,171 more ... 621 - Applied physics 1,062 658 - General management 918 700 - The arts; fine & decorative arts 856 000 - Computer science, information & general works 705 333 - Economics of land & energy 652 006 - Special computer methods 582 900 - History & geography 575 363 - Other social problems & services 567 005 - Computer programming, programs & data 501 570 - Life sciences; biology 388 004 - Data processing & computer science 361 380 - Commerce, communications & transportation 355 320 - Political science 353 500 - Natural sciences & mathematics 349 580 - Plants (Botany) 329 515 - Analysis 290 670 - Manufacturing 264 519 - Probabilities & applied mathematics 253 140 - Specific philosophical schools 243 300 - Social sciences 225 331 - Labor economics 210 576 - Genetics & evolution 193 340 - Law 184 650 - Management & auxiliary services 171 551 - Geology, hydrology & meteorology 165 630 - Agriculture & related technologies 157 628 - Sanitary & municipal engineering 153 100 - Philosophy & psychology 133 530 - Physics 129 364 - Criminology 121 370 - Education 108 338 - Production 104 540 - Chemistry & allied sciences 101 660 - Chemical engineering 89 302 - Social interaction 80 581 - Specific topics in natural history 76 745 - Decorative arts 76 720 - Architecture 74 362 - Social welfare problems & services 67 624 - Civil engineering 65 612 - Human physiology 64 615 - Pharmacology & therapeutics 62 384 - Communications; telecommunication 55 800 - Literature & rhetoric 55 414 - Phonology & phonetics 51 510 - Mathematics 50 304 - Factors affecting social behavior 48 632 - Plant injuries, diseases & pests 46 690 - Buildings 43 170 - Ethics 40 531 - Classical mechanics; solid mechanics 38 400 - Language 36 518 - Numerical analysis 36 616 - Diseases 36 577 - Ecology 34 664 - Food technology 33 332 - Financial economics 30 361 - Social problems & social welfare in general 28 511 - General principles of mathematics 27 381 - Commerce 24 657 - Accounting 23 153 - Mental processes & intelligence 22 534 - Sound & related vibrations 21 668 - Technology of other organic products 21 512 - Algebra 20 301 - Sociology & anthropology 19 327 - International relations 17 355 - Military science 16 543 - Analytical chemistry 16 614 - Incidence & prevention of disease 16 374 - Adult education 15 516 - Geometry 15 550 - Earth sciences 15 200 - Religion 14 613 - Personal health & safety 14 910 - Geography & travel 14 001 - Knowledge 13 410 - Linguistics 13 590 - Animals (Zoology) 13 641 - Food & drink 13 780 - Music 13 346 - Private law 12 781 - General principles & musical forms 12 158 - Applied psychology 11 368 - Insurance 11 541 - Physical chemistry 11 547 - Organic chemistry 11 535 - Light & infrared & ultraviolet phenomena 10 574 - [Unassigned] 10 627 - Hydraulic engineering 10 770 - Photography, photographs & computer art 10 120 - Epistemology, causation & humankind 9 303 - Social processes 9 321 - Systems of governments & states 9 see all ... less ...

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