Classification
363 - Other social problems & services
576 - Genetics & evolution
600 - Technology
620 - Engineering & allied operations
38
900 - History & geography
27
700 - The arts; fine & decorative arts
23
333 - Economics of land & energy
15
380 - Commerce, communications & transportation
12
140 - Specific philosophical schools
10
580 - Plants (Botany)
10
000 - Computer science, information & general works
9
320 - Political science
7
330 - Economics
7
720 - Architecture
7
340 - Law
6
500 - Natural sciences & mathematics
6
610 - Medicine & health
6
630 - Agriculture & related technologies
6
414 - Phonology & phonetics
5
304 - Factors affecting social behavior
4
551 - Geology, hydrology & meteorology
4
800 - Literature & rhetoric
4
170 - Ethics
2
300 - Social sciences
2
370 - Education
2
581 - Specific topics in natural history
2
658 - General management
2
400 - Language
1
530 - Physics
1
540 - Chemistry & allied sciences
1
657 - Accounting
1