Classification
000 - Computer science, information & general works
100 - Philosophy & psychology
300 - Social sciences
600 - Technology
700 - The arts; fine & decorative arts
10
170 - Ethics
5
320 - Political science
5
400 - Language
4
140 - Specific philosophical schools
3
200 - Religion
3
330 - Economics
3
340 - Law
3
620 - Engineering & allied operations
3
900 - History & geography
3
120 - Epistemology, causation & humankind
2
301 - Sociology & anthropology
2
360 - Social problems & services; associations
2
361 - Social problems & social welfare in general
2
364 - Criminology
2
370 - Education
2
380 - Commerce, communications & transportation
2
410 - Linguistics
2
630 - Agriculture & related technologies
2
780 - Music
2
160 - Logic
1
333 - Economics of land & energy
1
530 - Physics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
720 - Architecture
1
770 - Photography, photographs & computer art
1