Classification
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
551 - Geology, hydrology & meteorology
333 - Economics of land & energy
12
363 - Other social problems & services
12
000 - Computer science, information & general works
11
700 - The arts; fine & decorative arts
11
600 - Technology
7
140 - Specific philosophical schools
5
900 - History & geography
5
370 - Education
4
610 - Medicine & health
4
414 - Phonology & phonetics
3
576 - Genetics & evolution
3
620 - Engineering & allied operations
3
658 - General management
3
720 - Architecture
3
170 - Ethics
2
340 - Law
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
304 - Factors affecting social behavior
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
630 - Agriculture & related technologies
1
657 - Accounting
1