Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
576 - Genetics & evolution
600 - Technology
700 - The arts; fine & decorative arts
15
333 - Economics of land & energy
13
900 - History & geography
13
140 - Specific philosophical schools
12
620 - Engineering & allied operations
12
000 - Computer science, information & general works
10
340 - Law
9
330 - Economics
7
610 - Medicine & health
7
720 - Architecture
7
320 - Political science
6
500 - Natural sciences & mathematics
4
370 - Education
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
3
658 - General management
3
800 - Literature & rhetoric
3
170 - Ethics
2
300 - Social sciences
2
304 - Factors affecting social behavior
2
400 - Language
2
530 - Physics
2
580 - Plants (Botany)
2
657 - Accounting
2
410 - Linguistics
1
414 - Phonology & phonetics
1
650 - Management & auxiliary services
1