Classification
200 - Religion
333 - Economics of land & energy
370 - Education
700 - The arts; fine & decorative arts
610 - Medicine & health
4
000 - Computer science, information & general works
3
330 - Economics
3
140 - Specific philosophical schools
2
304 - Factors affecting social behavior
2
320 - Political science
2
340 - Law
2
363 - Other social problems & services
2
900 - History & geography
2
100 - Philosophy & psychology
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
380 - Commerce, communications & transportation
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1
620 - Engineering & allied operations
1