Classification
610 - Medicine & health
4,896
330 - Economics
4,557
616 - Diseases
2,940
658 - General management
1,999
621 - Applied physics
1,584
006 - Special computer methods
1,535
300 - Social sciences
1,338
320 - Political science
1,298
005 - Computer programming, programs & data
1,274
620 - Engineering & allied operations
1,180
338 - Production
919
340 - Law
884
004 - Data processing & computer science
882
571 - Physiology & related subjects
871
370 - Education
857
363 - Other social problems & services
770
333 - Economics of land & energy
753
500 - Natural sciences & mathematics
741
900 - History & geography
696
612 - Human physiology
695
530 - Physics
680
572 - Biochemistry
674
700 - The arts; fine & decorative arts
665
001 - Knowledge
651
331 - Labor economics
606
000 - Computer science, information & general works
590
306 - Culture & institutions
548
301 - Sociology & anthropology
543
332 - Financial economics
535
541 - Physical chemistry
494
650 - Management & auxiliary services
481
600 - Technology
478
302 - Social interaction
470
519 - Probabilities & applied mathematics
445
380 - Commerce, communications & transportation
434
615 - Pharmacology & therapeutics
419
327 - International relations
413
100 - Philosophy & psychology
409
003 - Systems
383
539 - Modern physics
378
304 - Factors affecting social behavior
363
551 - Geology, hydrology & meteorology
358
613 - Personal health & safety
345
577 - Ecology
341
150 - Psychology
309
664 - Food technology
304
520 - Astronomy & allied sciences
303
641 - Food & drink
293
305 - Social groups
292
820 - English & Old English literatures
292
more ...