Classification
320 - Political science
330 - Economics
900 - History & geography
105
340 - Law
58
300 - Social sciences
32
333 - Economics of land & energy
18
630 - Agriculture & related technologies
16
700 - The arts; fine & decorative arts
15
363 - Other social problems & services
11
000 - Computer science, information & general works
10
100 - Philosophy & psychology
10
140 - Specific philosophical schools
9
370 - Education
7
600 - Technology
7
170 - Ethics
5
610 - Medicine & health
5
380 - Commerce, communications & transportation
4
551 - Geology, hydrology & meteorology
4
620 - Engineering & allied operations
4
361 - Social problems & social welfare in general
3
581 - Specific topics in natural history
3
350 - Public administration & military science
2
580 - Plants (Botany)
2
658 - General management
2
304 - Factors affecting social behavior
1
336 - Public finance
1
400 - Language
1
576 - Genetics & evolution
1
657 - Accounting
1
720 - Architecture
1
800 - Literature & rhetoric
1