Classification
170 - Ethics
330 - Economics
606
320 - Political science
466
100 - Philosophy & psychology
385
140 - Specific philosophical schools
198
610 - Medicine & health
174
900 - History & geography
160
340 - Law
144
300 - Social sciences
143
658 - General management
138
200 - Religion
127
700 - The arts; fine & decorative arts
126
158 - Applied psychology
114
600 - Technology
97
174 - Occupational ethics
77
370 - Education
73
333 - Economics of land & energy
68
000 - Computer science, information & general works
56
363 - Other social problems & services
56
650 - Management & auxiliary services
54
800 - Literature & rhetoric
52
331 - Labor economics
51
380 - Commerce, communications & transportation
44
301 - Sociology & anthropology
41
338 - Production
36
620 - Engineering & allied operations
36
400 - Language
35
302 - Social interaction
31
361 - Social problems & social welfare in general
29
120 - Epistemology, causation & humankind
27
580 - Plants (Botany)
25
500 - Natural sciences & mathematics
23
530 - Physics
21
410 - Linguistics
19
581 - Specific topics in natural history
19
304 - Factors affecting social behavior
18
551 - Geology, hydrology & meteorology
17
576 - Genetics & evolution
16
297 - Islam, Babism & Bahai Faith
12
670 - Manufacturing
12
630 - Agriculture & related technologies
11
791 - Public performances
9
160 - Logic
8
381 - Commerce
8
384 - Communications; telecommunication
8
780 - Music
8
153 - Mental processes & intelligence
7
332 - Financial economics
7
001 - Knowledge
6
241 - Christian ethics
6
more ...