Classification
380 - Commerce, communications & transportation
580 - Plants (Botany)
000 - Computer science, information & general works
17
630 - Agriculture & related technologies
15
333 - Economics of land & energy
14
610 - Medicine & health
14
363 - Other social problems & services
13
620 - Engineering & allied operations
13
700 - The arts; fine & decorative arts
13
551 - Geology, hydrology & meteorology
11
600 - Technology
10
581 - Specific topics in natural history
9
576 - Genetics & evolution
8
140 - Specific philosophical schools
7
330 - Economics
7
612 - Human physiology
6
300 - Social sciences
5
414 - Phonology & phonetics
4
500 - Natural sciences & mathematics
4
540 - Chemistry & allied sciences
4
720 - Architecture
4
800 - Literature & rhetoric
3
900 - History & geography
3
100 - Philosophy & psychology
2
170 - Ethics
2
340 - Law
2
370 - Education
2
320 - Political science
1
530 - Physics
1
658 - General management
1