Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
620 - Engineering & allied operations
600 - Technology
11
700 - The arts; fine & decorative arts
11
900 - History & geography
9
576 - Genetics & evolution
7
140 - Specific philosophical schools
6
333 - Economics of land & energy
6
500 - Natural sciences & mathematics
6
000 - Computer science, information & general works
4
320 - Political science
4
340 - Law
4
414 - Phonology & phonetics
4
540 - Chemistry & allied sciences
4
580 - Plants (Botany)
4
300 - Social sciences
3
330 - Economics
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
610 - Medicine & health
3
612 - Human physiology
3
720 - Architecture
3
658 - General management
2
370 - Education
1
410 - Linguistics
1
800 - Literature & rhetoric
1