Classification
600 - Technology
700 - The arts; fine & decorative arts
39
610 - Medicine & health
38
620 - Engineering & allied operations
21
000 - Computer science, information & general works
18
140 - Specific philosophical schools
13
900 - History & geography
12
333 - Economics of land & energy
11
580 - Plants (Botany)
10
330 - Economics
8
363 - Other social problems & services
7
380 - Commerce, communications & transportation
7
540 - Chemistry & allied sciences
5
576 - Genetics & evolution
5
170 - Ethics
2
304 - Factors affecting social behavior
2
340 - Law
2
370 - Education
2
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
530 - Physics
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
300 - Social sciences
1
320 - Political science
1
361 - Social problems & social welfare in general
1
400 - Language
1
410 - Linguistics
1
612 - Human physiology
1
720 - Architecture
1
780 - Music
1