Classification
551 - Geology, hydrology & meteorology
581 - Specific topics in natural history
700 - The arts; fine & decorative arts
16
333 - Economics of land & energy
15
000 - Computer science, information & general works
14
363 - Other social problems & services
14
330 - Economics
11
610 - Medicine & health
11
630 - Agriculture & related technologies
11
580 - Plants (Botany)
10
600 - Technology
8
620 - Engineering & allied operations
7
140 - Specific philosophical schools
6
380 - Commerce, communications & transportation
6
320 - Political science
5
500 - Natural sciences & mathematics
5
576 - Genetics & evolution
5
300 - Social sciences
4
612 - Human physiology
4
370 - Education
3
414 - Phonology & phonetics
3
540 - Chemistry & allied sciences
3
410 - Linguistics
2
100 - Philosophy & psychology
1
200 - Religion
1
304 - Factors affecting social behavior
1
520 - Astronomy & allied sciences
1
791 - Public performances
1
800 - Literature & rhetoric
1
900 - History & geography
1