Classification
380 - Commerce, communications & transportation
600 - Technology
37
620 - Engineering & allied operations
900 - History & geography
333 - Economics of land & energy
34
700 - The arts; fine & decorative arts
28
000 - Computer science, information & general works
14
330 - Economics
11
363 - Other social problems & services
10
320 - Political science
9
610 - Medicine & health
8
140 - Specific philosophical schools
6
500 - Natural sciences & mathematics
6
370 - Education
5
551 - Geology, hydrology & meteorology
5
576 - Genetics & evolution
5
720 - Architecture
5
340 - Law
4
580 - Plants (Botany)
4
304 - Factors affecting social behavior
3
612 - Human physiology
3
630 - Agriculture & related technologies
3
658 - General management
3
300 - Social sciences
2
410 - Linguistics
2
540 - Chemistry & allied sciences
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
200 - Religion
1
400 - Language
1
414 - Phonology & phonetics
1
581 - Specific topics in natural history
1
770 - Photography, photographs & computer art
1