Classification
580 - Plants (Botany)
17
610 - Medicine & health
17
700 - The arts; fine & decorative arts
333 - Economics of land & energy
9
363 - Other social problems & services
9
000 - Computer science, information & general works
8
620 - Engineering & allied operations
8
630 - Agriculture & related technologies
8
140 - Specific philosophical schools
6
551 - Geology, hydrology & meteorology
6
600 - Technology
6
300 - Social sciences
5
380 - Commerce, communications & transportation
5
500 - Natural sciences & mathematics
5
576 - Genetics & evolution
5
540 - Chemistry & allied sciences
4
800 - Literature & rhetoric
4
900 - History & geography
4
414 - Phonology & phonetics
3
581 - Specific topics in natural history
3
612 - Human physiology
3
170 - Ethics
2
330 - Economics
2
340 - Law
2
720 - Architecture
2
400 - Language
1