Classification
000 - Computer science, information & general works
333 - Economics of land & energy
610 - Medicine & health
21
700 - The arts; fine & decorative arts
15
380 - Commerce, communications & transportation
8
580 - Plants (Botany)
6
540 - Chemistry & allied sciences
5
600 - Technology
5
620 - Engineering & allied operations
4
612 - Human physiology
3
140 - Specific philosophical schools
2
330 - Economics
2
363 - Other social problems & services
2
630 - Agriculture & related technologies
2
900 - History & geography
2
370 - Education
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
800 - Literature & rhetoric
1