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