Classification
140 - Specific philosophical schools
300 - Social sciences
330 - Economics
370 - Education
340 - Law
6
600 - Technology
5
301 - Sociology & anthropology
4
320 - Political science
4
620 - Engineering & allied operations
4
900 - History & geography
4
100 - Philosophy & psychology
3
363 - Other social problems & services
3
700 - The arts; fine & decorative arts
3
170 - Ethics
2
333 - Economics of land & energy
2
000 - Computer science, information & general works
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
380 - Commerce, communications & transportation
1
400 - Language
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
720 - Architecture
1
800 - Literature & rhetoric
1