Classification
380 - Commerce, communications & transportation
600 - Technology
45
000 - Computer science, information & general works
39
700 - The arts; fine & decorative arts
37
900 - History & geography
32
620 - Engineering & allied operations
30
330 - Economics
29
333 - Economics of land & energy
28
610 - Medicine & health
17
363 - Other social problems & services
16
320 - Political science
12
140 - Specific philosophical schools
8
340 - Law
8
370 - Education
8
500 - Natural sciences & mathematics
8
551 - Geology, hydrology & meteorology
8
400 - Language
7
100 - Philosophy & psychology
6
576 - Genetics & evolution
6
630 - Agriculture & related technologies
6
658 - General management
6
540 - Chemistry & allied sciences
5
300 - Social sciences
4
414 - Phonology & phonetics
4
580 - Plants (Botany)
4
780 - Music
4
530 - Physics
3
612 - Human physiology
3
304 - Factors affecting social behavior
2
410 - Linguistics
2
550 - Earth sciences
2
720 - Architecture
2
800 - Literature & rhetoric
2
200 - Religion
1
581 - Specific topics in natural history
1
615 - Pharmacology & therapeutics
1