Classification
333 - Economics of land & energy
8
600 - Technology
7
700 - The arts; fine & decorative arts
7
000 - Computer science, information & general works
5
363 - Other social problems & services
5
900 - History & geography
5
330 - Economics
4
380 - Commerce, communications & transportation
4
620 - Engineering & allied operations
4
580 - Plants (Botany)
3
320 - Political science
2
340 - Law
2
500 - Natural sciences & mathematics
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
140 - Specific philosophical schools
1
301 - Sociology & anthropology
1
370 - Education
1
400 - Language
1
410 - Linguistics
1
530 - Physics
1
658 - General management
1
720 - Architecture
1