Classification
551 - Geology, hydrology & meteorology
700 - The arts; fine & decorative arts
320 - Political science
6
330 - Economics
6
333 - Economics of land & energy
6
000 - Computer science, information & general works
5
600 - Technology
5
380 - Commerce, communications & transportation
4
363 - Other social problems & services
3
370 - Education
3
610 - Medicine & health
3
900 - History & geography
3
140 - Specific philosophical schools
2
720 - Architecture
2
297 - Islam, Babism & Bahai Faith
1
340 - Law
1
360 - Social problems & services; associations
1
400 - Language
1
800 - Literature & rhetoric
1