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