Classification
170 - Ethics
600 - Technology
4
620 - Engineering & allied operations
330 - Economics
3
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
200 - Religion
1
320 - Political science
1
340 - Law
1
363 - Other social problems & services
1
370 - Education
1
530 - Physics
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
720 - Architecture
1