Classification
580 - Plants (Botany)
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
22
551 - Geology, hydrology & meteorology
14
581 - Specific topics in natural history
12
363 - Other social problems & services
11
333 - Economics of land & energy
10
140 - Specific philosophical schools
9
330 - Economics
8
414 - Phonology & phonetics
7
576 - Genetics & evolution
7
610 - Medicine & health
7
630 - Agriculture & related technologies
6
900 - History & geography
5
300 - Social sciences
4
320 - Political science
4
380 - Commerce, communications & transportation
4
500 - Natural sciences & mathematics
4
612 - Human physiology
4
620 - Engineering & allied operations
4
540 - Chemistry & allied sciences
3
720 - Architecture
3
600 - Technology
2
650 - Management & auxiliary services
2
658 - General management
2
340 - Law
1
800 - Literature & rhetoric
1