Classification
140 - Specific philosophical schools
330 - Economics
333 - Economics of land & energy
363 - Other social problems & services
610 - Medicine & health
4
630 - Agriculture & related technologies
658 - General management
600 - Technology
3
620 - Engineering & allied operations
3
000 - Computer science, information & general works
2
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
700 - The arts; fine & decorative arts
2
297 - Islam, Babism & Bahai Faith
1
370 - Education
1
581 - Specific topics in natural history
1
900 - History & geography
1