Classification
140 - Specific philosophical schools
363 - Other social problems & services
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
15
900 - History & geography
13
000 - Computer science, information & general works
12
320 - Political science
10
720 - Architecture
10
330 - Economics
9
576 - Genetics & evolution
9
333 - Economics of land & energy
8
340 - Law
7
610 - Medicine & health
7
370 - Education
6
500 - Natural sciences & mathematics
4
580 - Plants (Botany)
4
581 - Specific topics in natural history
4
400 - Language
3
551 - Geology, hydrology & meteorology
3
170 - Ethics
2
200 - Religion
2
300 - Social sciences
2
304 - Factors affecting social behavior
2
361 - Social problems & social welfare in general
2
630 - Agriculture & related technologies
2
800 - Literature & rhetoric
2
160 - Logic
1
301 - Sociology & anthropology
1
410 - Linguistics
1
414 - Phonology & phonetics
1
612 - Human physiology
1
657 - Accounting
1
658 - General management
1