Classification
000 - Computer science, information & general works
170 - Ethics
320 - Political science
600 - Technology
8
700 - The arts; fine & decorative arts
8
300 - Social sciences
7
330 - Economics
6
100 - Philosophy & psychology
5
620 - Engineering & allied operations
5
200 - Religion
4
380 - Commerce, communications & transportation
4
140 - Specific philosophical schools
3
333 - Economics of land & energy
3
370 - Education
3
340 - Law
2
581 - Specific topics in natural history
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
900 - History & geography
2
120 - Epistemology, causation & humankind
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
364 - Criminology
1
414 - Phonology & phonetics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
800 - Literature & rhetoric
1