Classification
330 - Economics
363 - Other social problems & services
333 - Economics of land & energy
5
600 - Technology
5
630 - Agriculture & related technologies
5
620 - Engineering & allied operations
4
551 - Geology, hydrology & meteorology
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
320 - Political science
1
340 - Law
1
380 - Commerce, communications & transportation
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
610 - Medicine & health
1
658 - General management
1
720 - Architecture
1
900 - History & geography
1