Classification
000 - Computer science, information & general works
600 - Technology
620 - Engineering & allied operations
9
610 - Medicine & health
8
700 - The arts; fine & decorative arts
8
140 - Specific philosophical schools
5
333 - Economics of land & energy
5
630 - Agriculture & related technologies
4
380 - Commerce, communications & transportation
3
580 - Plants (Botany)
3
900 - History & geography
3
361 - Social problems & social welfare in general
2
363 - Other social problems & services
2
370 - Education
2
612 - Human physiology
2
170 - Ethics
1
330 - Economics
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
800 - Literature & rhetoric
1