Classification
140 - Specific philosophical schools
363 - Other social problems & services
580 - Plants (Botany)
600 - Technology
610 - Medicine & health
700 - The arts; fine & decorative arts
9
620 - Engineering & allied operations
7
333 - Economics of land & energy
6
900 - History & geography
5
630 - Agriculture & related technologies
4
330 - Economics
3
340 - Law
3
380 - Commerce, communications & transportation
3
170 - Ethics
2
300 - Social sciences
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
720 - Architecture
2
800 - Literature & rhetoric
2
297 - Islam, Babism & Bahai Faith
1
400 - Language
1
530 - Physics
1
540 - Chemistry & allied sciences
1
615 - Pharmacology & therapeutics
1
658 - General management
1