Classification
140 - Specific philosophical schools
330 - Economics
610 - Medicine & health
658 - General management
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
4
333 - Economics of land & energy
4
600 - Technology
4
380 - Commerce, communications & transportation
3
630 - Agriculture & related technologies
3
363 - Other social problems & services
2
500 - Natural sciences & mathematics
2
320 - Political science
1
361 - Social problems & social welfare in general
1
370 - Education
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
657 - Accounting
1
900 - History & geography
1