Classification
610 - Medicine & health
342
576 - Genetics & evolution
25
600 - Technology
22
612 - Human physiology
18
580 - Plants (Botany)
17
000 - Computer science, information & general works
16
363 - Other social problems & services
15
620 - Engineering & allied operations
12
330 - Economics
11
370 - Education
11
170 - Ethics
10
616 - Diseases
9
140 - Specific philosophical schools
8
700 - The arts; fine & decorative arts
7
380 - Commerce, communications & transportation
6
900 - History & geography
6
615 - Pharmacology & therapeutics
4
660 - Chemical engineering
4
333 - Economics of land & energy
3
361 - Social problems & social welfare in general
3
362 - Social welfare problems & services
3
572 - Biochemistry
3
581 - Specific topics in natural history
3
618 - Gynecology, obstetrics, pediatrics & geriatrics
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
300 - Social sciences
1
301 - Sociology & anthropology
1
340 - Law
1
579 - Microorganisms, fungi & algae
1
631 - Techniques, equipment & materials
1
658 - General management
1
800 - Literature & rhetoric
1