Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
576 - Genetics & evolution
900 - History & geography
600 - Technology
13
620 - Engineering & allied operations
11
700 - The arts; fine & decorative arts
11
140 - Specific philosophical schools
10
720 - Architecture
7
000 - Computer science, information & general works
6
333 - Economics of land & energy
6
340 - Law
6
610 - Medicine & health
6
800 - Literature & rhetoric
4
320 - Political science
3
500 - Natural sciences & mathematics
3
170 - Ethics
2
300 - Social sciences
2
304 - Factors affecting social behavior
2
330 - Economics
2
370 - Education
2
400 - Language
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
658 - General management
2
364 - Criminology
1
410 - Linguistics
1
414 - Phonology & phonetics
1
650 - Management & auxiliary services
1