Classification
610 - Medicine & health
658 - General management
900 - History & geography
600 - Technology
7
333 - Economics of land & energy
6
330 - Economics
5
140 - Specific philosophical schools
4
380 - Commerce, communications & transportation
4
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
4
363 - Other social problems & services
3
370 - Education
3
630 - Agriculture & related technologies
3
000 - Computer science, information & general works
2
580 - Plants (Botany)
2
800 - Literature & rhetoric
2
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
320 - Political science
1
400 - Language
1
410 - Linguistics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
657 - Accounting
1
720 - Architecture
1