Classification
140 - Specific philosophical schools
380 - Commerce, communications & transportation
610 - Medicine & health
21
363 - Other social problems & services
18
333 - Economics of land & energy
17
700 - The arts; fine & decorative arts
14
000 - Computer science, information & general works
13
600 - Technology
12
620 - Engineering & allied operations
10
900 - History & geography
8
320 - Political science
7
330 - Economics
7
551 - Geology, hydrology & meteorology
7
580 - Plants (Botany)
7
170 - Ethics
5
304 - Factors affecting social behavior
5
370 - Education
4
800 - Literature & rhetoric
4
340 - Law
3
576 - Genetics & evolution
3
630 - Agriculture & related technologies
3
658 - General management
3
581 - Specific topics in natural history
2
720 - Architecture
2
100 - Philosophy & psychology
1
200 - Religion
1
300 - Social sciences
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
550 - Earth sciences
1
612 - Human physiology
1
920 - Biography, genealogy & insignia
1