Classification
600 - Technology
56
700 - The arts; fine & decorative arts
45
333 - Economics of land & energy
44
620 - Engineering & allied operations
41
900 - History & geography
40
000 - Computer science, information & general works
39
380 - Commerce, communications & transportation
15
576 - Genetics & evolution
15
500 - Natural sciences & mathematics
13
330 - Economics
10
530 - Physics
10
363 - Other social problems & services
9
340 - Law
8
580 - Plants (Botany)
7
610 - Medicine & health
7
551 - Geology, hydrology & meteorology
6
630 - Agriculture & related technologies
5
414 - Phonology & phonetics
4
540 - Chemistry & allied sciences
4
800 - Literature & rhetoric
4
140 - Specific philosophical schools
3
304 - Factors affecting social behavior
3
300 - Social sciences
1
320 - Political science
1
370 - Education
1
536 - Heat
1
547 - Organic chemistry
1
581 - Specific topics in natural history
1
590 - Animals (Zoology)
1