Classification
300 - Social sciences
001 - Knowledge
4,319
330 - Economics
1,867
500 - Natural sciences & mathematics
1,628
658 - General management
1,468
302 - Social interaction
1,408
670 - Manufacturing
1,377
320 - Political science
868
900 - History & geography
803
301 - Sociology & anthropology
407
370 - Education
382
100 - Philosophy & psychology
364
700 - The arts; fine & decorative arts
350
338 - Production
299
600 - Technology
238
140 - Specific philosophical schools
230
381 - Commerce
222
380 - Commerce, communications & transportation
171
331 - Labor economics
170
200 - Religion
163
000 - Computer science, information & general works
150
304 - Factors affecting social behavior
150
610 - Medicine & health
147
333 - Economics of land & energy
138
340 - Law
136
363 - Other social problems & services
135
620 - Engineering & allied operations
135
800 - Literature & rhetoric
121
384 - Communications; telecommunication
108
650 - Management & auxiliary services
107
158 - Applied psychology
89
153 - Mental processes & intelligence
81
170 - Ethics
79
400 - Language
78
630 - Agriculture & related technologies
75
361 - Social problems & social welfare in general
61
332 - Financial economics
57
364 - Criminology
57
410 - Linguistics
52
360 - Social problems & services; associations
51
005 - Computer programming, programs & data
40
780 - Music
39
297 - Islam, Babism & Bahai Faith
37
551 - Geology, hydrology & meteorology
36
745 - Decorative arts
36
576 - Genetics & evolution
35
720 - Architecture
34
368 - Insurance
28
581 - Specific topics in natural history
23
120 - Epistemology, causation & humankind
22
more ...