Classification
610 - Medicine & health
330 - Economics
61
700 - The arts; fine & decorative arts
61
363 - Other social problems & services
49
333 - Economics of land & energy
48
320 - Political science
47
000 - Computer science, information & general works
44
140 - Specific philosophical schools
41
600 - Technology
39
900 - History & geography
33
370 - Education
30
380 - Commerce, communications & transportation
23
580 - Plants (Botany)
23
300 - Social sciences
21
620 - Engineering & allied operations
19
340 - Law
18
551 - Geology, hydrology & meteorology
18
100 - Philosophy & psychology
16
304 - Factors affecting social behavior
12
361 - Social problems & social welfare in general
12
630 - Agriculture & related technologies
12
658 - General management
12
576 - Genetics & evolution
9
581 - Specific topics in natural history
8
170 - Ethics
7
400 - Language
7
540 - Chemistry & allied sciences
7
720 - Architecture
7
360 - Social problems & services; associations
6
410 - Linguistics
5
200 - Religion
4
301 - Sociology & anthropology
3
350 - Public administration & military science
3
612 - Human physiology
3
800 - Literature & rhetoric
3
500 - Natural sciences & mathematics
2
550 - Earth sciences
2
615 - Pharmacology & therapeutics
2
780 - Music
2
336 - Public finance
1
364 - Criminology
1
657 - Accounting
1