Classification
000 - Computer science, information & general works
370 - Education
610 - Medicine & health
700 - The arts; fine & decorative arts
3
900 - History & geography
320 - Political science
2
600 - Technology
2
620 - Engineering & allied operations
2
100 - Philosophy & psychology
1
170 - Ethics
1
330 - Economics
1
333 - Economics of land & energy
1
360 - Social problems & services; associations
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
400 - Language
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1