Classification
304 - Factors affecting social behavior
700 - The arts; fine & decorative arts
610 - Medicine & health
10
000 - Computer science, information & general works
9
333 - Economics of land & energy
8
140 - Specific philosophical schools
5
330 - Economics
5
363 - Other social problems & services
5
551 - Geology, hydrology & meteorology
4
580 - Plants (Botany)
4
320 - Political science
3
600 - Technology
3
380 - Commerce, communications & transportation
2
540 - Chemistry & allied sciences
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
800 - Literature & rhetoric
2
170 - Ethics
1
300 - Social sciences
1
361 - Social problems & social welfare in general
1
370 - Education
1
410 - Linguistics
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
581 - Specific topics in natural history
1
770 - Photography, photographs & computer art
1