Classification
000 - Computer science, information & general works
540 - Chemistry & allied sciences
700 - The arts; fine & decorative arts
10
333 - Economics of land & energy
9
576 - Genetics & evolution
5
600 - Technology
5
620 - Engineering & allied operations
4
500 - Natural sciences & mathematics
3
304 - Factors affecting social behavior
2
330 - Economics
2
380 - Commerce, communications & transportation
2
414 - Phonology & phonetics
2
581 - Specific topics in natural history
2
900 - History & geography
2
140 - Specific philosophical schools
1
363 - Other social problems & services
1
370 - Education
1
400 - Language
1
610 - Medicine & health
1
612 - Human physiology
1
720 - Architecture
1