Classification
600 - Technology
620 - Engineering & allied operations
15
700 - The arts; fine & decorative arts
11
000 - Computer science, information & general works
9
580 - Plants (Botany)
9
630 - Agriculture & related technologies
9
363 - Other social problems & services
8
900 - History & geography
7
333 - Economics of land & energy
6
610 - Medicine & health
6
551 - Geology, hydrology & meteorology
5
140 - Specific philosophical schools
4
414 - Phonology & phonetics
4
330 - Economics
3
380 - Commerce, communications & transportation
3
304 - Factors affecting social behavior
2
400 - Language
2
612 - Human physiology
2
800 - Literature & rhetoric
2
370 - Education
1
576 - Genetics & evolution
1
658 - General management
1
720 - Architecture
1