Classification
000 - Computer science, information & general works
400 - Language
700 - The arts; fine & decorative arts
900 - History & geography
140 - Specific philosophical schools
6
600 - Technology
6
620 - Engineering & allied operations
6
380 - Commerce, communications & transportation
5
333 - Economics of land & energy
4
720 - Architecture
4
320 - Political science
3
330 - Economics
3
363 - Other social problems & services
3
100 - Philosophy & psychology
2
370 - Education
2
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
2
780 - Music
2
800 - Literature & rhetoric
2
200 - Religion
1
301 - Sociology & anthropology
1
581 - Specific topics in natural history
1
590 - Animals (Zoology)
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
658 - General management
1
791 - Public performances
1