Classification
100 - Philosophy & psychology
330 - Economics
333 - Economics of land & energy
7
610 - Medicine & health
5
370 - Education
3
600 - Technology
3
620 - Engineering & allied operations
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
300 - Social sciences
2
320 - Political science
2
363 - Other social problems & services
2
581 - Specific topics in natural history
2
000 - Computer science, information & general works
1
340 - Law
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
791 - Public performances
1