Classification
580 - Plants (Botany)
600 - Technology
700 - The arts; fine & decorative arts
333 - Economics of land & energy
3
363 - Other social problems & services
3
620 - Engineering & allied operations
3
000 - Computer science, information & general works
2
330 - Economics
2
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
900 - History & geography
2
340 - Law
1
361 - Social problems & social welfare in general
1
400 - Language
1
500 - Natural sciences & mathematics
1
612 - Human physiology
1
658 - General management
1
800 - Literature & rhetoric
1