Classification
000 - Computer science, information & general works
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
333 - Economics of land & energy
11
900 - History & geography
11
363 - Other social problems & services
10
600 - Technology
10
330 - Economics
9
320 - Political science
7
620 - Engineering & allied operations
7
551 - Geology, hydrology & meteorology
5
610 - Medicine & health
5
720 - Architecture
3
800 - Literature & rhetoric
3
500 - Natural sciences & mathematics
2
530 - Physics
2
576 - Genetics & evolution
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
370 - Education
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
657 - Accounting
1
780 - Music
1