Classification
333 - Economics of land & energy
900 - History & geography
700 - The arts; fine & decorative arts
11
330 - Economics
10
600 - Technology
8
380 - Commerce, communications & transportation
6
620 - Engineering & allied operations
6
320 - Political science
5
363 - Other social problems & services
5
000 - Computer science, information & general works
4
340 - Law
3
370 - Education
3
140 - Specific philosophical schools
2
300 - Social sciences
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
301 - Sociology & anthropology
1
400 - Language
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
658 - General management
1
720 - Architecture
1
800 - Literature & rhetoric
1