Classification
100 - Philosophy & psychology
320 - Political science
600 - Technology
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
8
900 - History & geography
8
300 - Social sciences
7
330 - Economics
6
620 - Engineering & allied operations
6
140 - Specific philosophical schools
4
630 - Agriculture & related technologies
4
780 - Music
4
170 - Ethics
3
200 - Religion
3
333 - Economics of land & energy
3
370 - Education
3
380 - Commerce, communications & transportation
3
400 - Language
3
610 - Medicine & health
3
720 - Architecture
3
301 - Sociology & anthropology
2
340 - Law
2
363 - Other social problems & services
2
410 - Linguistics
2
770 - Photography, photographs & computer art
2
120 - Epistemology, causation & humankind
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
658 - General management
1