Classification
140 - Specific philosophical schools
330 - Economics
600 - Technology
620 - Engineering & allied operations
658 - General management
000 - Computer science, information & general works
4
333 - Economics of land & energy
4
363 - Other social problems & services
4
630 - Agriculture & related technologies
4
700 - The arts; fine & decorative arts
4
900 - History & geography
4
580 - Plants (Botany)
3
610 - Medicine & health
3
380 - Commerce, communications & transportation
2
720 - Architecture
2
297 - Islam, Babism & Bahai Faith
1
320 - Political science
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1