Classification
320 - Political science
330 - Economics
15
333 - Economics of land & energy
380 - Commerce, communications & transportation
6
700 - The arts; fine & decorative arts
6
000 - Computer science, information & general works
4
297 - Islam, Babism & Bahai Faith
4
363 - Other social problems & services
4
551 - Geology, hydrology & meteorology
4
600 - Technology
4
200 - Religion
3
304 - Factors affecting social behavior
3
340 - Law
3
610 - Medicine & health
3
140 - Specific philosophical schools
2
581 - Specific topics in natural history
2
900 - History & geography
2
300 - Social sciences
1
301 - Sociology & anthropology
1
350 - Public administration & military science
1
410 - Linguistics
1
658 - General management
1
800 - Literature & rhetoric
1