Classification
370 - Education
551 - Geology, hydrology & meteorology
900 - History & geography
320 - Political science
4
330 - Economics
4
610 - Medicine & health
4
700 - The arts; fine & decorative arts
4
333 - Economics of land & energy
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
600 - Technology
3
000 - Computer science, information & general works
2
720 - Architecture
2
140 - Specific philosophical schools
1
360 - Social problems & services; associations
1
400 - Language
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
770 - Photography, photographs & computer art
1