Classification
330 - Economics
363 - Other social problems & services
380 - Commerce, communications & transportation
576 - Genetics & evolution
333 - Economics of land & energy
10
000 - Computer science, information & general works
9
320 - Political science
8
600 - Technology
7
140 - Specific philosophical schools
6
700 - The arts; fine & decorative arts
6
551 - Geology, hydrology & meteorology
4
581 - Specific topics in natural history
4
304 - Factors affecting social behavior
3
620 - Engineering & allied operations
3
340 - Law
2
370 - Education
2
410 - Linguistics
2
610 - Medicine & health
2
657 - Accounting
2
658 - General management
2
800 - Literature & rhetoric
2
900 - History & geography
2
400 - Language
1
414 - Phonology & phonetics
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
720 - Architecture
1