Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
320 - Political science
333 - Economics of land & energy
330 - Economics
19
700 - The arts; fine & decorative arts
18
363 - Other social problems & services
14
600 - Technology
9
551 - Geology, hydrology & meteorology
8
300 - Social sciences
7
610 - Medicine & health
7
380 - Commerce, communications & transportation
6
620 - Engineering & allied operations
5
304 - Factors affecting social behavior
4
581 - Specific topics in natural history
4
900 - History & geography
4
100 - Philosophy & psychology
3
370 - Education
3
576 - Genetics & evolution
3
630 - Agriculture & related technologies
3
170 - Ethics
2
200 - Religion
2
340 - Law
2
361 - Social problems & social welfare in general
2
414 - Phonology & phonetics
2
658 - General management
2
720 - Architecture
2
301 - Sociology & anthropology
1
500 - Natural sciences & mathematics
1
657 - Accounting
1
800 - Literature & rhetoric
1