Classification
301 - Sociology & anthropology
320 - Political science
300 - Social sciences
122
900 - History & geography
54
100 - Philosophy & psychology
43
700 - The arts; fine & decorative arts
41
330 - Economics
35
200 - Religion
31
140 - Specific philosophical schools
25
340 - Law
22
363 - Other social problems & services
22
304 - Factors affecting social behavior
20
333 - Economics of land & energy
18
370 - Education
16
000 - Computer science, information & general works
14
600 - Technology
14
170 - Ethics
13
380 - Commerce, communications & transportation
11
610 - Medicine & health
10
400 - Language
9
720 - Architecture
8
410 - Linguistics
7
581 - Specific topics in natural history
7
361 - Social problems & social welfare in general
6
780 - Music
6
800 - Literature & rhetoric
5
297 - Islam, Babism & Bahai Faith
4
350 - Public administration & military science
4
364 - Criminology
4
576 - Genetics & evolution
4
630 - Agriculture & related technologies
4
500 - Natural sciences & mathematics
3
530 - Physics
3
620 - Engineering & allied operations
3
120 - Epistemology, causation & humankind
2
360 - Social problems & services; associations
2
551 - Geology, hydrology & meteorology
2
336 - Public finance
1
398 - Folklore
1
520 - Astronomy & allied sciences
1
657 - Accounting
1
791 - Public performances
1