Classification
301 - Sociology & anthropology
330 - Economics
300 - Social sciences
51
320 - Political science
33
900 - History & geography
28
700 - The arts; fine & decorative arts
21
333 - Economics of land & energy
20
340 - Law
16
363 - Other social problems & services
16
140 - Specific philosophical schools
15
100 - Philosophy & psychology
14
200 - Religion
12
600 - Technology
11
380 - Commerce, communications & transportation
10
000 - Computer science, information & general works
8
370 - Education
8
610 - Medicine & health
8
304 - Factors affecting social behavior
6
620 - Engineering & allied operations
6
170 - Ethics
4
361 - Social problems & social welfare in general
4
400 - Language
4
576 - Genetics & evolution
3
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
336 - Public finance
2
364 - Criminology
2
410 - Linguistics
2
530 - Physics
2
720 - Architecture
2
780 - Music
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
338 - Production
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
657 - Accounting
1