Classification
320 - Political science
330 - Economics
363 - Other social problems & services
610 - Medicine & health
700 - The arts; fine & decorative arts
333 - Economics of land & energy
15
000 - Computer science, information & general works
12
140 - Specific philosophical schools
12
551 - Geology, hydrology & meteorology
10
600 - Technology
8
380 - Commerce, communications & transportation
7
370 - Education
5
900 - History & geography
5
581 - Specific topics in natural history
4
630 - Agriculture & related technologies
4
720 - Architecture
4
580 - Plants (Botany)
3
620 - Engineering & allied operations
3
304 - Factors affecting social behavior
2
340 - Law
2
550 - Earth sciences
2
576 - Genetics & evolution
2
658 - General management
2
100 - Philosophy & psychology
1
200 - Religion
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
800 - Literature & rhetoric
1