Classification
000 - Computer science, information & general works
580 - Plants (Botany)
581 - Specific topics in natural history
700 - The arts; fine & decorative arts
610 - Medicine & health
15
551 - Geology, hydrology & meteorology
12
363 - Other social problems & services
8
333 - Economics of land & energy
7
140 - Specific philosophical schools
6
414 - Phonology & phonetics
6
576 - Genetics & evolution
5
620 - Engineering & allied operations
5
630 - Agriculture & related technologies
5
500 - Natural sciences & mathematics
4
300 - Social sciences
3
330 - Economics
3
380 - Commerce, communications & transportation
3
540 - Chemistry & allied sciences
3
600 - Technology
3
612 - Human physiology
3
320 - Political science
2
900 - History & geography
2
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
398 - Folklore
1
520 - Astronomy & allied sciences
1
615 - Pharmacology & therapeutics
1
658 - General management
1
800 - Literature & rhetoric
1