Classification
580 - Plants (Botany)
000 - Computer science, information & general works
20
333 - Economics of land & energy
15
700 - The arts; fine & decorative arts
14
610 - Medicine & health
13
363 - Other social problems & services
12
380 - Commerce, communications & transportation
10
581 - Specific topics in natural history
10
551 - Geology, hydrology & meteorology
9
620 - Engineering & allied operations
9
600 - Technology
8
576 - Genetics & evolution
7
140 - Specific philosophical schools
6
630 - Agriculture & related technologies
5
330 - Economics
4
414 - Phonology & phonetics
4
500 - Natural sciences & mathematics
4
100 - Philosophy & psychology
3
300 - Social sciences
3
320 - Political science
3
540 - Chemistry & allied sciences
3
612 - Human physiology
3
658 - General management
3
900 - History & geography
3
370 - Education
2
720 - Architecture
2
800 - Literature & rhetoric
2
170 - Ethics
1
200 - Religion
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
530 - Physics
1
590 - Animals (Zoology)
1