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