Classification
330 - Economics
580 - Plants (Botany)
700 - The arts; fine & decorative arts
333 - Economics of land & energy
13
600 - Technology
10
363 - Other social problems & services
9
630 - Agriculture & related technologies
7
000 - Computer science, information & general works
6
610 - Medicine & health
6
620 - Engineering & allied operations
6
900 - History & geography
5
380 - Commerce, communications & transportation
3
551 - Geology, hydrology & meteorology
3
140 - Specific philosophical schools
2
370 - Education
2
658 - General management
2
100 - Philosophy & psychology
1
320 - Political science
1
340 - Law
1
581 - Specific topics in natural history
1
612 - Human physiology
1