Classification
580 - Plants (Botany)
333 - Economics of land & energy
19
600 - Technology
18
363 - Other social problems & services
16
330 - Economics
15
620 - Engineering & allied operations
12
000 - Computer science, information & general works
10
700 - The arts; fine & decorative arts
10
900 - History & geography
7
551 - Geology, hydrology & meteorology
5
630 - Agriculture & related technologies
5
610 - Medicine & health
4
658 - General management
4
380 - Commerce, communications & transportation
3
140 - Specific philosophical schools
2
500 - Natural sciences & mathematics
2
320 - Political science
1
340 - Law
1
400 - Language
1
530 - Physics
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1
720 - Architecture
1
800 - Literature & rhetoric
1