Classification
000 - Computer science, information & general works
370 - Education
380 - Commerce, communications & transportation
600 - Technology
330 - Economics
13
700 - The arts; fine & decorative arts
13
333 - Economics of land & energy
10
363 - Other social problems & services
10
610 - Medicine & health
10
140 - Specific philosophical schools
9
320 - Political science
8
620 - Engineering & allied operations
6
900 - History & geography
6
100 - Philosophy & psychology
5
400 - Language
5
720 - Architecture
5
300 - Social sciences
4
170 - Ethics
3
340 - Law
3
410 - Linguistics
3
576 - Genetics & evolution
3
581 - Specific topics in natural history
3
200 - Religion
2
304 - Factors affecting social behavior
2
500 - Natural sciences & mathematics
2
551 - Geology, hydrology & meteorology
2
780 - Music
2
160 - Logic
1
361 - Social problems & social welfare in general
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
657 - Accounting
1
658 - General management
1