Classification
140 - Specific philosophical schools
600 - Technology
700 - The arts; fine & decorative arts
13
000 - Computer science, information & general works
10
330 - Economics
9
333 - Economics of land & energy
9
363 - Other social problems & services
9
380 - Commerce, communications & transportation
9
610 - Medicine & health
9
620 - Engineering & allied operations
8
320 - Political science
7
370 - Education
6
900 - History & geography
6
300 - Social sciences
5
170 - Ethics
4
361 - Social problems & social welfare in general
4
200 - Religion
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
3
100 - Philosophy & psychology
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
400 - Language
2
500 - Natural sciences & mathematics
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
340 - Law
1
410 - Linguistics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
720 - Architecture
1
780 - Music
1
800 - Literature & rhetoric
1