Classification
340 - Law
320 - Political science
176
330 - Economics
169
140 - Specific philosophical schools
53
363 - Other social problems & services
37
700 - The arts; fine & decorative arts
34
380 - Commerce, communications & transportation
30
600 - Technology
27
610 - Medicine & health
27
300 - Social sciences
26
900 - History & geography
26
333 - Economics of land & energy
25
000 - Computer science, information & general works
24
170 - Ethics
20
620 - Engineering & allied operations
18
630 - Agriculture & related technologies
18
100 - Philosophy & psychology
11
580 - Plants (Botany)
9
551 - Geology, hydrology & meteorology
8
304 - Factors affecting social behavior
7
364 - Criminology
6
200 - Religion
5
301 - Sociology & anthropology
5
361 - Social problems & social welfare in general
5
370 - Education
5
576 - Genetics & evolution
5
500 - Natural sciences & mathematics
4
540 - Chemistry & allied sciences
4
400 - Language
3
581 - Specific topics in natural history
3
658 - General management
3
800 - Literature & rhetoric
3
344 - Labor, social, education & cultural law
2
360 - Social problems & services; associations
2
410 - Linguistics
2
720 - Architecture
2
341 - Law of nations
1
350 - Public administration & military science
1
398 - Folklore
1
414 - Phonology & phonetics
1
530 - Physics
1