Classification
140 - Specific philosophical schools
330 - Economics
610 - Medicine & health
658 - General management
333 - Economics of land & energy
6
600 - Technology
6
700 - The arts; fine & decorative arts
6
000 - Computer science, information & general works
5
630 - Agriculture & related technologies
5
363 - Other social problems & services
4
380 - Commerce, communications & transportation
4
620 - Engineering & allied operations
3
500 - Natural sciences & mathematics
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
900 - History & geography
2
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
320 - Political science
1
361 - Social problems & social welfare in general
1
370 - Education
1
581 - Specific topics in natural history
1
657 - Accounting
1