Classification
620 - Engineering & allied operations
900 - History & geography
600 - Technology
105
700 - The arts; fine & decorative arts
63
333 - Economics of land & energy
34
330 - Economics
17
000 - Computer science, information & general works
15
610 - Medicine & health
15
363 - Other social problems & services
13
576 - Genetics & evolution
12
580 - Plants (Botany)
12
140 - Specific philosophical schools
8
414 - Phonology & phonetics
6
500 - Natural sciences & mathematics
6
540 - Chemistry & allied sciences
6
370 - Education
5
380 - Commerce, communications & transportation
5
720 - Architecture
4
320 - Political science
3
658 - General management
3
170 - Ethics
2
304 - Factors affecting social behavior
2
581 - Specific topics in natural history
2
612 - Human physiology
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
400 - Language
1
530 - Physics
1
615 - Pharmacology & therapeutics
1
630 - Agriculture & related technologies
1