Classification
380 - Commerce, communications & transportation
410 - Linguistics
600 - Technology
000 - Computer science, information & general works
6
900 - History & geography
6
400 - Language
5
620 - Engineering & allied operations
5
140 - Specific philosophical schools
4
330 - Economics
4
370 - Education
4
363 - Other social problems & services
3
700 - The arts; fine & decorative arts
3
100 - Philosophy & psychology
2
300 - Social sciences
2
320 - Political science
2
333 - Economics of land & energy
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
610 - Medicine & health
2
658 - General management
2
780 - Music
2
160 - Logic
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1