Classification
658 - General management
2,192
330 - Economics
2,029
302 - Social interaction
1,852
300 - Social sciences
1,842
500 - Natural sciences & mathematics
1,475
670 - Manufacturing
1,392
150 - Psychology
669
006 - Special computer methods
547
610 - Medicine & health
540
700 - The arts; fine & decorative arts
391
338 - Production
377
600 - Technology
372
331 - Labor economics
339
333 - Economics of land & energy
337
000 - Computer science, information & general works
332
620 - Engineering & allied operations
315
381 - Commerce
314
005 - Computer programming, programs & data
294
004 - Data processing & computer science
291
900 - History & geography
231
380 - Commerce, communications & transportation
227
158 - Applied psychology
216
363 - Other social problems & services
209
616 - Diseases
206
612 - Human physiology
175
650 - Management & auxiliary services
165
153 - Mental processes & intelligence
154
140 - Specific philosophical schools
145
370 - Education
144
384 - Communications; telecommunication
132
371 - Schools & their activities; special education
103
576 - Genetics & evolution
100
100 - Philosophy & psychology
98
320 - Political science
86
580 - Plants (Botany)
83
155 - Differential & developmental psychology
80
364 - Criminology
78
340 - Law
77
591 - Specific topics in natural history
71
332 - Financial economics
70
303 - Social processes
61
570 - Life sciences; biology
61
301 - Sociology & anthropology
58
306 - Culture & institutions
56
590 - Animals (Zoology)
54
621 - Applied physics
49
745 - Decorative arts
48
025 - Library operations
45
304 - Factors affecting social behavior
43
170 - Ethics
41
more ...