Classification
140 - Specific philosophical schools
320 - Political science
330 - Economics
600 - Technology
333 - Economics of land & energy
16
363 - Other social problems & services
12
700 - The arts; fine & decorative arts
12
000 - Computer science, information & general works
10
551 - Geology, hydrology & meteorology
8
620 - Engineering & allied operations
8
300 - Social sciences
7
900 - History & geography
6
380 - Commerce, communications & transportation
5
370 - Education
4
581 - Specific topics in natural history
4
301 - Sociology & anthropology
3
576 - Genetics & evolution
3
610 - Medicine & health
3
630 - Agriculture & related technologies
3
100 - Philosophy & psychology
2
170 - Ethics
2
200 - Religion
2
304 - Factors affecting social behavior
2
340 - Law
2
361 - Social problems & social welfare in general
2
580 - Plants (Botany)
2
658 - General management
2
720 - Architecture
2
336 - Public finance
1
657 - Accounting
1
800 - Literature & rhetoric
1