Classification
330 - Economics
370 - Education
333 - Economics of land & energy
9
140 - Specific philosophical schools
8
600 - Technology
8
610 - Medicine & health
8
363 - Other social problems & services
7
380 - Commerce, communications & transportation
5
000 - Computer science, information & general works
4
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
4
320 - Political science
2
410 - Linguistics
2
630 - Agriculture & related technologies
2
657 - Accounting
2
900 - History & geography
2
160 - Logic
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
658 - General management
1
780 - Music
1