Classification
000 - Computer science, information & general works
100 - Philosophy & psychology
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
2
170 - Ethics
2
200 - Religion
3
300 - Social sciences
8
301 - Sociology & anthropology
1
320 - Political science
330 - Economics
333 - Economics of land & energy
5
363 - Other social problems & services
2
370 - Education
1
380 - Commerce, communications & transportation
2
400 - Language
2
410 - Linguistics
3
500 - Natural sciences & mathematics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
600 - Technology
4
610 - Medicine & health
1
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
3
700 - The arts; fine & decorative arts
4
720 - Architecture
1
770 - Photography, photographs & computer art
1
780 - Music
2
800 - Literature & rhetoric
2
900 - History & geography
3