Classification
720 - Architecture
700 - The arts; fine & decorative arts
10
600 - Technology
9
000 - Computer science, information & general works
8
333 - Economics of land & energy
8
140 - Specific philosophical schools
7
900 - History & geography
7
620 - Engineering & allied operations
6
363 - Other social problems & services
4
500 - Natural sciences & mathematics
4
576 - Genetics & evolution
4
580 - Plants (Botany)
4
581 - Specific topics in natural history
4
320 - Political science
3
330 - Economics
3
340 - Law
3
100 - Philosophy & psychology
2
300 - Social sciences
2
380 - Commerce, communications & transportation
2
400 - Language
2
414 - Phonology & phonetics
2
780 - Music
2
800 - Literature & rhetoric
2
170 - Ethics
1
200 - Religion
1
370 - Education
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
770 - Photography, photographs & computer art
1