Classification
610 - Medicine & health
200 - Religion
15
700 - The arts; fine & decorative arts
11
363 - Other social problems & services
10
900 - History & geography
9
140 - Specific philosophical schools
8
170 - Ethics
7
600 - Technology
7
100 - Philosophy & psychology
6
620 - Engineering & allied operations
6
000 - Computer science, information & general works
5
333 - Economics of land & energy
5
320 - Political science
4
380 - Commerce, communications & transportation
4
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
306 - Culture & institutions
2
330 - Economics
2
370 - Education
2
400 - Language
2
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
530 - Physics
2
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
2
780 - Music
2
800 - Literature & rhetoric
2
300 - Social sciences
1
340 - Law
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
920 - Biography, genealogy & insignia
1