Classification
300 - Social sciences
551 - Geology, hydrology & meteorology
600 - Technology
320 - Political science
8
363 - Other social problems & services
7
620 - Engineering & allied operations
5
140 - Specific philosophical schools
4
330 - Economics
4
333 - Economics of land & energy
3
700 - The arts; fine & decorative arts
3
200 - Religion
2
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
630 - Agriculture & related technologies
2
900 - History & geography
2
000 - Computer science, information & general works
1
301 - Sociology & anthropology
1
350 - Public administration & military science
1
370 - Education
1
530 - Physics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1