Classification
140 - Specific philosophical schools
340 - Law
363 - Other social problems & services
600 - Technology
700 - The arts; fine & decorative arts
7
620 - Engineering & allied operations
6
380 - Commerce, communications & transportation
5
576 - Genetics & evolution
5
720 - Architecture
5
900 - History & geography
5
500 - Natural sciences & mathematics
4
300 - Social sciences
3
320 - Political science
3
333 - Economics of land & energy
3
610 - Medicine & health
3
630 - Agriculture & related technologies
3
170 - Ethics
2
330 - Economics
2
580 - Plants (Botany)
2
800 - Literature & rhetoric
2
350 - Public administration & military science
1
370 - Education
1
400 - Language
1
581 - Specific topics in natural history
1
612 - Human physiology
1