Classification
170 - Ethics
330 - Economics
490
320 - Political science
337
100 - Philosophy & psychology
279
610 - Medicine & health
158
140 - Specific philosophical schools
151
658 - General management
139
700 - The arts; fine & decorative arts
114
158 - Applied psychology
108
300 - Social sciences
108
900 - History & geography
105
340 - Law
97
200 - Religion
90
600 - Technology
90
174 - Occupational ethics
77
333 - Economics of land & energy
64
000 - Computer science, information & general works
57
363 - Other social problems & services
57
331 - Labor economics
54
370 - Education
53
650 - Management & auxiliary services
51
380 - Commerce, communications & transportation
42
620 - Engineering & allied operations
40
301 - Sociology & anthropology
38
800 - Literature & rhetoric
37
338 - Production
34
302 - Social interaction
31
400 - Language
30
120 - Epistemology, causation & humankind
27
500 - Natural sciences & mathematics
27
580 - Plants (Botany)
25
361 - Social problems & social welfare in general
24
530 - Physics
18
304 - Factors affecting social behavior
17
551 - Geology, hydrology & meteorology
17
576 - Genetics & evolution
17
581 - Specific topics in natural history
17
630 - Agriculture & related technologies
14
297 - Islam, Babism & Bahai Faith
13
410 - Linguistics
12
670 - Manufacturing
12
381 - Commerce
9
153 - Mental processes & intelligence
8
332 - Financial economics
7
360 - Social problems & services; associations
7
384 - Communications; telecommunication
7
720 - Architecture
6
001 - Knowledge
5
155 - Differential & developmental psychology
5
364 - Criminology
4
more ...