Classification
140 - Specific philosophical schools
330 - Economics
363 - Other social problems & services
15
700 - The arts; fine & decorative arts
14
000 - Computer science, information & general works
13
320 - Political science
12
333 - Economics of land & energy
12
551 - Geology, hydrology & meteorology
12
610 - Medicine & health
8
370 - Education
6
380 - Commerce, communications & transportation
6
580 - Plants (Botany)
5
300 - Social sciences
4
340 - Law
4
600 - Technology
4
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
2
658 - General management
2
900 - History & geography
2
301 - Sociology & anthropology
1
350 - Public administration & military science
1
414 - Phonology & phonetics
1
530 - Physics
1
576 - Genetics & evolution
1
612 - Human physiology
1
657 - Accounting
1
720 - Architecture
1
800 - Literature & rhetoric
1