Classification
370 - Education
610 - Medicine & health
123
700 - The arts; fine & decorative arts
32
363 - Other social problems & services
26
380 - Commerce, communications & transportation
26
000 - Computer science, information & general works
24
333 - Economics of land & energy
24
600 - Technology
18
140 - Specific philosophical schools
17
330 - Economics
15
100 - Philosophy & psychology
13
320 - Political science
12
900 - History & geography
8
300 - Social sciences
7
301 - Sociology & anthropology
7
304 - Factors affecting social behavior
7
170 - Ethics
5
361 - Social problems & social welfare in general
5
551 - Geology, hydrology & meteorology
5
658 - General management
5
400 - Language
4
580 - Plants (Botany)
4
581 - Specific topics in natural history
4
620 - Engineering & allied operations
4
360 - Social problems & services; associations
3
340 - Law
2
362 - Social welfare problems & services
2
372 - Elementary education
2
410 - Linguistics
2
576 - Genetics & evolution
2
780 - Music
2
200 - Religion
1
398 - Folklore
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1
630 - Agriculture & related technologies
1
720 - Architecture
1
800 - Literature & rhetoric
1