Classification
363 - Other social problems & services
551 - Geology, hydrology & meteorology
10
600 - Technology
9
620 - Engineering & allied operations
8
333 - Economics of land & energy
7
628 - Sanitary & municipal engineering
6
320 - Political science
5
330 - Economics
5
581 - Specific topics in natural history
4
720 - Architecture
3
140 - Specific philosophical schools
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
327 - International relations
1
340 - Law
1
364 - Criminology
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
930 - History of ancient world to ca. 499
1