Classification
330 - Economics
363 - Other social problems & services
620 - Engineering & allied operations
600 - Technology
13
700 - The arts; fine & decorative arts
9
333 - Economics of land & energy
8
900 - History & geography
7
580 - Plants (Botany)
5
000 - Computer science, information & general works
4
610 - Medicine & health
4
140 - Specific philosophical schools
3
380 - Commerce, communications & transportation
3
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
2
630 - Agriculture & related technologies
2
658 - General management
2
576 - Genetics & evolution
1
657 - Accounting
1