Classification
320 - Political science
330 - Economics
300 - Social sciences
78
900 - History & geography
25
630 - Agriculture & related technologies
20
700 - The arts; fine & decorative arts
16
333 - Economics of land & energy
13
000 - Computer science, information & general works
11
140 - Specific philosophical schools
11
363 - Other social problems & services
11
610 - Medicine & health
10
340 - Law
9
551 - Geology, hydrology & meteorology
9
304 - Factors affecting social behavior
8
170 - Ethics
7
380 - Commerce, communications & transportation
6
600 - Technology
6
100 - Philosophy & psychology
4
370 - Education
4
200 - Religion
3
580 - Plants (Botany)
3
658 - General management
3
414 - Phonology & phonetics
2
550 - Earth sciences
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
301 - Sociology & anthropology
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
382 - International commerce
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1