Classification
140 - Specific philosophical schools
580 - Plants (Botany)
630 - Agriculture & related technologies
333 - Economics of land & energy
7
610 - Medicine & health
7
600 - Technology
6
620 - Engineering & allied operations
6
330 - Economics
5
363 - Other social problems & services
5
700 - The arts; fine & decorative arts
5
000 - Computer science, information & general works
4
581 - Specific topics in natural history
4
900 - History & geography
4
380 - Commerce, communications & transportation
3
551 - Geology, hydrology & meteorology
3
658 - General management
3
800 - Literature & rhetoric
3
170 - Ethics
2
300 - Social sciences
2
340 - Law
2
576 - Genetics & evolution
2
720 - Architecture
2
297 - Islam, Babism & Bahai Faith
1
320 - Political science
1
370 - Education
1
612 - Human physiology
1