Classification
100 - Philosophy & psychology
330 - Economics
600 - Technology
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
12
900 - History & geography
10
300 - Social sciences
8
333 - Economics of land & energy
7
320 - Political science
6
370 - Education
6
610 - Medicine & health
6
630 - Agriculture & related technologies
6
000 - Computer science, information & general works
4
363 - Other social problems & services
4
780 - Music
4
140 - Specific philosophical schools
3
200 - Religion
3
380 - Commerce, communications & transportation
3
400 - Language
3
530 - Physics
3
658 - General management
3
720 - Architecture
3
301 - Sociology & anthropology
2
410 - Linguistics
2
540 - Chemistry & allied sciences
2
770 - Photography, photographs & computer art
2
170 - Ethics
1
340 - Law
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
791 - Public performances
1
800 - Literature & rhetoric
1