610 - Medicine & health 809 700 - The arts; fine & decorative arts 82 330 - Economics 72 100 - Philosophy & psychology 66 370 - Education 42 363 - Other social problems & services 40 more ... 612 - Human physiology 21 600 - Technology 19 000 - Computer science, information & general works 17 380 - Commerce, communications & transportation 14 580 - Plants (Botany) 13 900 - History & geography 13 333 - Economics of land & energy 11 340 - Law 9 362 - Social welfare problems & services 9 616 - Diseases 9 140 - Specific philosophical schools 8 361 - Social problems & social welfare in general 8 170 - Ethics 6 540 - Chemistry & allied sciences 6 576 - Genetics & evolution 5 620 - Engineering & allied operations 5 500 - Natural sciences & mathematics 3 551 - Geology, hydrology & meteorology 3 800 - Literature & rhetoric 3 353 - Specific fields of public administration 2 355 - Military science 2 371 - Schools & their activities; special education 2 400 - Language 2 507 - Education, research & related topics 2 530 - Physics 2 570 - Life sciences; biology 2 613 - Personal health & safety 2 615 - Pharmacology & therapeutics 2 001 - Knowledge 1 302 - Social interaction 1 304 - Factors affecting social behavior 1 320 - Political science 1 344 - Labor, social, education & cultural law 1 379 - Public policy issues in education 1 410 - Linguistics 1 502 - Miscellany 1 520 - Astronomy & allied sciences 1 542 - Techniques, equipment & materials 1 614 - Incidence & prevention of disease 1 660 - Chemical engineering 1 720 - Architecture 1 see all ... less ...

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