Classification
140 - Specific philosophical schools
380 - Commerce, communications & transportation
610 - Medicine & health
700 - The arts; fine & decorative arts
51
333 - Economics of land & energy
41
363 - Other social problems & services
35
000 - Computer science, information & general works
34
600 - Technology
28
330 - Economics
25
580 - Plants (Botany)
21
620 - Engineering & allied operations
18
370 - Education
16
576 - Genetics & evolution
15
900 - History & geography
14
304 - Factors affecting social behavior
12
400 - Language
10
551 - Geology, hydrology & meteorology
10
320 - Political science
9
540 - Chemistry & allied sciences
9
500 - Natural sciences & mathematics
8
170 - Ethics
7
300 - Social sciences
7
658 - General management
7
800 - Literature & rhetoric
7
340 - Law
6
612 - Human physiology
6
630 - Agriculture & related technologies
6
581 - Specific topics in natural history
5
720 - Architecture
5
414 - Phonology & phonetics
4
615 - Pharmacology & therapeutics
4
100 - Philosophy & psychology
3
410 - Linguistics
3
361 - Social problems & social welfare in general
2
200 - Religion
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
550 - Earth sciences
1
590 - Animals (Zoology)
1
657 - Accounting
1