Classification
330 - Economics
580 - Plants (Botany)
610 - Medicine & health
900 - History & geography
333 - Economics of land & energy
5
600 - Technology
5
363 - Other social problems & services
4
620 - Engineering & allied operations
4
630 - Agriculture & related technologies
3
000 - Computer science, information & general works
2
540 - Chemistry & allied sciences
2
658 - General management
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
297 - Islam, Babism & Bahai Faith
1
380 - Commerce, communications & transportation
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1