Classification
320 - Political science
330 - Economics
21
333 - Economics of land & energy
8
340 - Law
8
600 - Technology
7
700 - The arts; fine & decorative arts
6
900 - History & geography
6
100 - Philosophy & psychology
4
380 - Commerce, communications & transportation
4
630 - Agriculture & related technologies
4
350 - Public administration & military science
3
363 - Other social problems & services
3
620 - Engineering & allied operations
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
300 - Social sciences
2
304 - Factors affecting social behavior
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
720 - Architecture
2
770 - Photography, photographs & computer art
2
791 - Public performances
2
200 - Religion
1
301 - Sociology & anthropology
1
610 - Medicine & health
1
780 - Music
1
800 - Literature & rhetoric
1