Classification
000 - Computer science, information & general works
800 - Literature & rhetoric
700 - The arts; fine & decorative arts
11
600 - Technology
7
333 - Economics of land & energy
6
363 - Other social problems & services
6
500 - Natural sciences & mathematics
6
551 - Geology, hydrology & meteorology
5
330 - Economics
4
620 - Engineering & allied operations
4
900 - History & geography
4
380 - Commerce, communications & transportation
3
530 - Physics
3
140 - Specific philosophical schools
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
720 - Architecture
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
304 - Factors affecting social behavior
1
320 - Political science
1
520 - Astronomy & allied sciences
1
658 - General management
1
780 - Music
1