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