Classification
140 - Specific philosophical schools
576 - Genetics & evolution
610 - Medicine & health
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
9
380 - Commerce, communications & transportation
7
000 - Computer science, information & general works
6
333 - Economics of land & energy
6
363 - Other social problems & services
6
300 - Social sciences
5
580 - Plants (Botany)
5
500 - Natural sciences & mathematics
4
551 - Geology, hydrology & meteorology
4
600 - Technology
4
340 - Law
3
414 - Phonology & phonetics
3
540 - Chemistry & allied sciences
3
581 - Specific topics in natural history
3
612 - Human physiology
3
900 - History & geography
3
170 - Ethics
2
630 - Agriculture & related technologies
2
720 - Architecture
2
800 - Literature & rhetoric
2
330 - Economics
1
370 - Education
1
400 - Language
1
658 - General management
1