Classification
600 - Technology
620 - Engineering & allied operations
630 - Agriculture & related technologies
363 - Other social problems & services
10
000 - Computer science, information & general works
9
700 - The arts; fine & decorative arts
8
333 - Economics of land & energy
7
580 - Plants (Botany)
7
330 - Economics
5
900 - History & geography
5
340 - Law
4
140 - Specific philosophical schools
3
300 - Social sciences
3
380 - Commerce, communications & transportation
3
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
3
610 - Medicine & health
3
170 - Ethics
2
320 - Political science
2
581 - Specific topics in natural history
2
720 - Architecture
2
800 - Literature & rhetoric
2
304 - Factors affecting social behavior
1
370 - Education
1
540 - Chemistry & allied sciences
1
657 - Accounting
1