Classification
140 - Specific philosophical schools
363 - Other social problems & services
380 - Commerce, communications & transportation
610 - Medicine & health
700 - The arts; fine & decorative arts
20
333 - Economics of land & energy
17
000 - Computer science, information & general works
16
330 - Economics
12
580 - Plants (Botany)
12
576 - Genetics & evolution
10
600 - Technology
10
620 - Engineering & allied operations
10
551 - Geology, hydrology & meteorology
9
370 - Education
6
300 - Social sciences
5
304 - Factors affecting social behavior
5
340 - Law
5
900 - History & geography
5
320 - Political science
4
414 - Phonology & phonetics
4
540 - Chemistry & allied sciences
4
581 - Specific topics in natural history
4
612 - Human physiology
4
630 - Agriculture & related technologies
4
658 - General management
4
720 - Architecture
4
800 - Literature & rhetoric
4
400 - Language
3
500 - Natural sciences & mathematics
3
170 - Ethics
2
100 - Philosophy & psychology
1
410 - Linguistics
1
550 - Earth sciences
1
657 - Accounting
1