Classification
610 - Medicine & health
000 - Computer science, information & general works
67
700 - The arts; fine & decorative arts
67
140 - Specific philosophical schools
46
333 - Economics of land & energy
41
576 - Genetics & evolution
39
580 - Plants (Botany)
39
363 - Other social problems & services
36
380 - Commerce, communications & transportation
26
600 - Technology
26
620 - Engineering & allied operations
20
540 - Chemistry & allied sciences
16
500 - Natural sciences & mathematics
14
615 - Pharmacology & therapeutics
13
551 - Geology, hydrology & meteorology
12
612 - Human physiology
11
304 - Factors affecting social behavior
10
330 - Economics
10
581 - Specific topics in natural history
10
630 - Agriculture & related technologies
10
300 - Social sciences
7
800 - Literature & rhetoric
6
900 - History & geography
6
400 - Language
5
720 - Architecture
5
370 - Education
4
414 - Phonology & phonetics
4
100 - Philosophy & psychology
3
170 - Ethics
3
301 - Sociology & anthropology
3
658 - General management
3
340 - Law
2
320 - Political science
1
364 - Criminology
1
572 - Biochemistry
1
590 - Animals (Zoology)
1
616 - Diseases
1