Classification
370 - Education
28
320 - Political science
27
330 - Economics
23
300 - Social sciences
18
900 - History & geography
13
333 - Economics of land & energy
12
600 - Technology
12
100 - Philosophy & psychology
11
700 - The arts; fine & decorative arts
11
380 - Commerce, communications & transportation
10
140 - Specific philosophical schools
7
340 - Law
6
610 - Medicine & health
6
200 - Religion
5
170 - Ethics
4
363 - Other social problems & services
4
000 - Computer science, information & general works
3
301 - Sociology & anthropology
3
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
3
297 - Islam, Babism & Bahai Faith
2
400 - Language
2
720 - Architecture
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
336 - Public finance
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
414 - Phonology & phonetics
1
530 - Physics
1
581 - Specific topics in natural history
1