Classification
330 - Economics
30
333 - Economics of land & energy
12
000 - Computer science, information & general works
6
600 - Technology
5
630 - Agriculture & related technologies
5
363 - Other social problems & services
4
380 - Commerce, communications & transportation
4
610 - Medicine & health
4
700 - The arts; fine & decorative arts
4
320 - Political science
3
140 - Specific philosophical schools
2
300 - Social sciences
2
340 - Law
2
361 - Social problems & social welfare in general
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
658 - General management
2
336 - Public finance
1
370 - Education
1
400 - Language
1
620 - Engineering & allied operations
1
650 - Management & auxiliary services
1
657 - Accounting
1
900 - History & geography
1