Classification
370 - Education
900 - History & geography
600 - Technology
5
700 - The arts; fine & decorative arts
5
333 - Economics of land & energy
4
363 - Other social problems & services
4
380 - Commerce, communications & transportation
4
610 - Medicine & health
4
620 - Engineering & allied operations
4
320 - Political science
3
330 - Economics
3
400 - Language
3
720 - Architecture
3
000 - Computer science, information & general works
2
500 - Natural sciences & mathematics
2
551 - Geology, hydrology & meteorology
2
140 - Specific philosophical schools
1
300 - Social sciences
1
361 - Social problems & social welfare in general
1
540 - Chemistry & allied sciences
1
657 - Accounting
1