Classification
380 - Commerce, communications & transportation
540 - Chemistry & allied sciences
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
25
333 - Economics of land & energy
22
620 - Engineering & allied operations
14
610 - Medicine & health
13
363 - Other social problems & services
10
580 - Plants (Botany)
10
600 - Technology
10
140 - Specific philosophical schools
9
576 - Genetics & evolution
9
500 - Natural sciences & mathematics
7
900 - History & geography
7
414 - Phonology & phonetics
6
530 - Physics
6
551 - Geology, hydrology & meteorology
6
330 - Economics
4
612 - Human physiology
4
300 - Social sciences
3
581 - Specific topics in natural history
3
304 - Factors affecting social behavior
2
320 - Political science
2
400 - Language
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
340 - Law
1
361 - Social problems & social welfare in general
1
370 - Education
1
590 - Animals (Zoology)
1
658 - General management
1
800 - Literature & rhetoric
1