Classification
100 - Philosophy & psychology
370 - Education
600 - Technology
610 - Medicine & health
330 - Economics
6
620 - Engineering & allied operations
6
900 - History & geography
6
700 - The arts; fine & decorative arts
5
333 - Economics of land & energy
4
000 - Computer science, information & general works
3
300 - Social sciences
3
500 - Natural sciences & mathematics
3
170 - Ethics
2
320 - Political science
2
380 - Commerce, communications & transportation
2
657 - Accounting
2
720 - Architecture
2
780 - Music
2
140 - Specific philosophical schools
1
363 - Other social problems & services
1
530 - Physics
1
540 - Chemistry & allied sciences
1
791 - Public performances
1
800 - Literature & rhetoric
1