Classification
000 - Computer science, information & general works
330 - Economics
600 - Technology
10
610 - Medicine & health
620 - Engineering & allied operations
10
900 - History & geography
333 - Economics of land & energy
6
700 - The arts; fine & decorative arts
6
380 - Commerce, communications & transportation
4
720 - Architecture
4
140 - Specific philosophical schools
3
170 - Ethics
3
320 - Political science
3
363 - Other social problems & services
3
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
300 - Social sciences
1
370 - Education
1
500 - Natural sciences & mathematics
1
530 - Physics
1
581 - Specific topics in natural history
1