Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
330 - Economics
8
600 - Technology
7
000 - Computer science, information & general works
6
140 - Specific philosophical schools
6
333 - Economics of land & energy
6
657 - Accounting
6
700 - The arts; fine & decorative arts
5
900 - History & geography
5
320 - Political science
4
620 - Engineering & allied operations
4
370 - Education
3
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
720 - Architecture
2
300 - Social sciences
1
340 - Law
1
400 - Language
1
414 - Phonology & phonetics
1
580 - Plants (Botany)
1
610 - Medicine & health
1
650 - Management & auxiliary services
1
800 - Literature & rhetoric
1