Classification
301 - Sociology & anthropology
330 - Economics
300 - Social sciences
88
320 - Political science
44
900 - History & geography
35
700 - The arts; fine & decorative arts
24
333 - Economics of land & energy
21
363 - Other social problems & services
20
140 - Specific philosophical schools
18
340 - Law
18
610 - Medicine & health
18
100 - Philosophy & psychology
17
304 - Factors affecting social behavior
16
600 - Technology
15
200 - Religion
12
380 - Commerce, communications & transportation
10
361 - Social problems & social welfare in general
9
000 - Computer science, information & general works
8
370 - Education
8
620 - Engineering & allied operations
7
630 - Agriculture & related technologies
6
170 - Ethics
4
400 - Language
4
576 - Genetics & evolution
4
500 - Natural sciences & mathematics
3
581 - Specific topics in natural history
3
800 - Literature & rhetoric
3
297 - Islam, Babism & Bahai Faith
2
336 - Public finance
2
364 - Criminology
2
410 - Linguistics
2
530 - Physics
2
720 - Architecture
2
780 - Music
2
120 - Epistemology, causation & humankind
1
338 - Production
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
657 - Accounting
1