Classification
140 - Specific philosophical schools
3
320 - Political science
4
330 - Economics
333 - Economics of land & energy
5
340 - Law
1
363 - Other social problems & services
8
540 - Chemistry & allied sciences
1
550 - Earth sciences
2
551 - Geology, hydrology & meteorology
4
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
600 - Technology
610 - Medicine & health
3
620 - Engineering & allied operations
630 - Agriculture & related technologies
7
700 - The arts; fine & decorative arts
1
900 - History & geography
2