Classification
333 - Economics of land & energy
64
600 - Technology
63
700 - The arts; fine & decorative arts
48
620 - Engineering & allied operations
47
900 - History & geography
43
000 - Computer science, information & general works
37
380 - Commerce, communications & transportation
17
330 - Economics
14
363 - Other social problems & services
11
530 - Physics
9
576 - Genetics & evolution
9
580 - Plants (Botany)
9
500 - Natural sciences & mathematics
7
610 - Medicine & health
7
320 - Political science
4
551 - Geology, hydrology & meteorology
4
140 - Specific philosophical schools
3
340 - Law
3
400 - Language
3
414 - Phonology & phonetics
3
621 - Applied physics
2
658 - General management
2
720 - Architecture
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
370 - Education
1
540 - Chemistry & allied sciences
1
615 - Pharmacology & therapeutics
1
630 - Agriculture & related technologies
1