Classification
320 - Political science
363 - Other social problems & services
330 - Economics
17
700 - The arts; fine & decorative arts
15
000 - Computer science, information & general works
14
333 - Economics of land & energy
12
380 - Commerce, communications & transportation
11
600 - Technology
11
140 - Specific philosophical schools
10
610 - Medicine & health
10
370 - Education
8
900 - History & geography
8
551 - Geology, hydrology & meteorology
7
581 - Specific topics in natural history
6
304 - Factors affecting social behavior
4
620 - Engineering & allied operations
4
200 - Religion
3
301 - Sociology & anthropology
3
300 - Social sciences
2
340 - Law
2
361 - Social problems & social welfare in general
2
414 - Phonology & phonetics
2
576 - Genetics & evolution
2
630 - Agriculture & related technologies
2
170 - Ethics
1
500 - Natural sciences & mathematics
1
550 - Earth sciences
1
657 - Accounting
1