Classification
361 - Social problems & social welfare in general
330 - Economics
185
320 - Political science
167
610 - Medicine & health
134
360 - Social problems & services; associations
108
300 - Social sciences
91
700 - The arts; fine & decorative arts
50
333 - Economics of land & energy
44
140 - Specific philosophical schools
41
340 - Law
41
900 - History & geography
41
000 - Computer science, information & general works
40
100 - Philosophy & psychology
39
363 - Other social problems & services
32
304 - Factors affecting social behavior
30
170 - Ethics
29
600 - Technology
29
370 - Education
26
658 - General management
23
380 - Commerce, communications & transportation
21
500 - Natural sciences & mathematics
20
620 - Engineering & allied operations
18
364 - Criminology
17
301 - Sociology & anthropology
16
200 - Religion
14
630 - Agriculture & related technologies
13
362 - Social welfare problems & services
12
580 - Plants (Botany)
9
350 - Public administration & military science
8
551 - Geology, hydrology & meteorology
8
612 - Human physiology
8
576 - Genetics & evolution
7
650 - Management & auxiliary services
6
331 - Labor economics
5
336 - Public finance
5
590 - Animals (Zoology)
5
332 - Financial economics
4
338 - Production
4
800 - Literature & rhetoric
4
581 - Specific topics in natural history
3
780 - Music
3
001 - Knowledge
2
011 - Bibliographies
2
303 - Social processes
2
372 - Elementary education
2
400 - Language
2
414 - Phonology & phonetics
2
540 - Chemistry & allied sciences
2
615 - Pharmacology & therapeutics
2
791 - Public performances
2
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