Classification
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
333 - Economics of land & energy
21
600 - Technology
18
900 - History & geography
18
000 - Computer science, information & general works
16
363 - Other social problems & services
16
330 - Economics
15
620 - Engineering & allied operations
12
551 - Geology, hydrology & meteorology
10
320 - Political science
9
610 - Medicine & health
9
720 - Architecture
6
370 - Education
4
800 - Literature & rhetoric
4
540 - Chemistry & allied sciences
3
576 - Genetics & evolution
3
658 - General management
3
100 - Philosophy & psychology
2
500 - Natural sciences & mathematics
2
530 - Physics
2
630 - Agriculture & related technologies
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
580 - Plants (Botany)
1
657 - Accounting
1
780 - Music
1